How To Prepare for UPSC IAS 2020 - You might have heard UPSC IAS 2020 preparation is not for the faint-hearted. There is a reason why UPSC Civil Services Exam (CSE) is considered the mother of all exams in the country. About 10 lakh candidates take UPSC IAS Prelims exam every year. Out of this, less than 1% of candidates are selected and inducted into the prestigious civil service of India. It all comes down to the strategy of UPSC 2020 IAS preparation. The top question in the minds of IAS aspirants is how to crack IAS 2020? Clearing the IAS exam requires smart work along with hard work. UPSC IAS exam has a huge syllabus and it can be quite overwhelming. UPSC IAS preparation 2020 takes at least one year to cover the diverse range of subjects and topics. Aspirants often look for tips to prepare for IAS 2020 - what to study, where to study and how to prepare for the UPSC IAS 2020 exam? This article talks about this and more to help candidates crack the UPSC civil services exam.

How To Prepare for UPSC IAS 2020

UPSC CSE is conducted every year in three stages - Prelims, Mains and Interview.UPSC IAS 2020 exam is scheduled to be held on May 31. Post - UPSC IAS preparation you will feel like a transformed person in terms of knowledge, confidence, skills and personality. Let us know how to crack IAS 2020 and embark on the journey to pursue your dream of becoming an IAS officer.

How To Prepare for UPSC IAS 2020: Myths & Facts



Coaching is important for UPSC IAS preparation 2020.

There are many toppers who have managed their UPSC IAS 2020 preparation by self study while staying in their hometowns.

Staying in Delhi is important for UPSC IAS 2020 preparation.

These days, study material for UPSC IAS 2020 preparation is easily available on the internet or can be easily ordered/couriered by post.

You need to be a bookworm to clear the IAS exam.

Clearing the IAS exam takes a lot more than mere intelligence. It requires a strong character - patience, determination, continuous efforts, self-motivation and discipline.

How to prepare for Civil Services IAS 2020- Video

Declare War on UPSC Civil Services Examination 2020


UPSC civil services exam is a war. And you are a warrior. Develop a warrior mindset. A warrior is completely focused, energetic, disciplined, proactive and aggressive. There is no half-preparation or half-hearted efforts in UPSC IAS preparation 2020. You have to fully commit yourself to win this battle, otherwise you will be killed by better warriors. So, straighten your back, pull up your strength and get ready to fight. Read below for useful tips to prepare for IAS 2020.

The Starting Line


Know your Deadline: UPSC Exam Dates

A serious candidate must know UPSC Exam Dates to formulate his/her UPSC IAS 2020 preparation strategy according to time available to him/her.

Check the table below for the date of UPSC IAS exam 2020:

S. No.

Name of Examination

Date of Notification

Last date to submit applications

Exam date

Duration of Exam


Civil Services (Preliminary) Examination, 2020

February 12, 2020

March 03, 2020

May 31, 2020



Civil Services (Main) Examination, 2020

September 18, 2020


Know the Battle-lines: UPSC IAS 2020 Exam Pattern

War on UPSC IAS preparation 2020 consists of three battles:

  1. Prelims

  2. Mains

  3. Interview

You need to win all three battles to emerge as the winner at the end of it. All three battles require different strategies.

  • Prelims stage of UPSC IAS preparation 2020 is more about gaining knowledge on a vast number of topics. You don't really need to go very deep while studying a topic. While preparing for prelims applicants should also have idea about UPSC IAS cut off

  • Mains stage of UPSC IAS 2020 preparation requires you to delve deep into a topic within the defined syllabus of Mains. You may find yourself reading B.A. and M.A. level books, practically becoming a graduate in your optional subject.

  • Interview is a personality test. It will test various aspects of your personality and qualities such as diplomatic skills, communication skills, presence of mind, reaction to stress and pressure, etc.

Survey the Ground to be Covered - Know the UPSC IAS Syllabus

The syllabus is the foundation on which you will plan and build your UPSC IAS preparation. The candidate must know the UPSC IAS syllabus thoroughly. The UPSC notification contains detailed syllabus for the Civil Services Preliminary and Main examination.


  • The knowledge of complete syllabus will help you know which books you need to read. It will also help you to avoid missing any important topic.

  • For UPSC IAS preparation 2020, it is very important to know what to study, from where to study and what to skip.

  • Remember, UPSC IAS 2020 preparation is not made up of one particular topic alone. It is a mixture of a lot of things. So don’t overdo anything.

Know your Weapons - Books for UPSC IAS 2020

Arm yourself with the Best Books for UPSC IAS recommended by experts. UPSC IAS preparation 2020 doesn't mean you read every book available on earth. Human memory does not have the capacity to remember everything it encounters. Moreover, a lot of good books maybe more valuable for academics and research purposes, but not necessarily required to clear the UPSC exam. Here is a subject-wise list of recommended books for UPSC IAS 2020 preparation - Prelims:


Recommended Books



  1. NCERT XI (Ancient & Medieval)

  2. NCERT XII (Modern Indian History)

  3. Facets of Indian Culture – Spectrum

  4. From Plassey to Partition - A History of Modern India

  5. India’s Struggle for Independence – Bipan Chandra

For Prelims, the first 4 books should be sufficient. For Mains, you should read India’s Struggle for Independence – Bipan Chandra, but it is better if one can finish it before Prelims because there isn’t much time left after Prelims to prepare for Mains.

Indian Art & Culture

Indian Art & Culture - Nitin Singhania

This book can be used for both Prelims and Mains



  2. Indian Polity – M Laxmikanth

For prelims you don’t need to read any other book on Polity except Indian Polity – M Laxmikanth. Many questions asked in the Prelims paper seem to have come directly from this book. However, for Mains, you should read D D Basu as it helps you to form opinions you may need to answer some difficult questions in the exam.


  1. NCERT VI – X (Old Syllabus)

  2. NCERT XI, XII (New Syllabus)

  3. Certificate Physical Geography – G C Leong

  4. World Atlas

Read and revise NCERTs thoroughly. Lot of questions in Prelims are asked from content given in NCERT.



  2. The Indian Economy – Sanjiv Verma

  3. Sriram IAS Economics notes

  4. Indian Economy by Ramesh Singh

  5. Economic Development & Policies in India – Jain & Ohri

The Indian Economy –Sanjiv Verma is very good for beginners and for those who find economics distasteful and difficult. It explains concepts in very simple language. The book by Ramesh Singh can be read after the book by Sanjiv Verma.


  1. Class XII Biology (last 5 chapters)

  2. Environment by Shankar IAS Academy
  3. Environment & Ecology: Biodiversity, Climate Change and Disaster Management - General Studies for Civil Services (Main) Examination - Paper II and IV - Majid Hussain

Last 5 chapters of the Class XII NCERT Biology book are based on Environment.
Nowadays, in UPSC Prelims, questions on environment are not only related to concepts but also from the current issues related to the environment. Read the newspaper carefully.

International Relations

  1. NCERT XII (Contemporary World Politics)

  2. Current Affairs

International relations keep changing and you must read newspaper to keep yourself updated on the latest developments in the world.

General Knowledge

  1. Government websites like the PIB, PRS

  2. Watch National television programmes featured on the Rajya Sabha TV

The candidate can make use of many government sources for their UPSC IAS 2020 preparation. All the content (study material) available on government websites and books are highly authentic and reliable.


  1. Yojana

  2. Kurukshetra

  3. Economic & Political Weekly

  4. Geography and You

  5. Science Reporter

  6. Current Affairs magazine like Chronicle Civil Services

If you can, try to get a gist/summary of these magazines. The gist is provided online by many coaching centres. You may subscribe to it. It will save a lot of time. You will not have to read unnecessary information.

You may refer to some Current Affairs magazine to fill up the gap in your notes.

Get Ready for the War

IAS Preparation Tips 2020: Gear Up

You must prepare yourself mentally and physically for the long and hard journey of UPSC IAS preparation 2020.

  • Keep your physically healthy. Avoid unhealthy or suspicious food. You don't want to get sick and lose days in recovering. Time is precious given the vast IAS syllabus involved in UPSC IAS 2020 preparation.

  • Keep yourself mentally healthy. Focus cannot be attained if your mind is occupied with worrying. UPSC IAS preparation 2020 should be your topmost priority.

  • There are certain periods of time during a day when you are most-productive. Some candidates feel fully-focused during early morning hours, some are most productive during afternoon while others may be able to concentrate most during night. Try to maximize your UPSC IAS 2020 preparation studies in your most productive hours.

  • Stay disciplined in following your daily study routine.

  • Be prepared to cut down on your social life because UPSC IAS preparation 2020 demands long hours of studies. Success comes at a price. Go underground during your UPSC IAS 2020 preparation. Be available for only the most important things.

  • If you are a working professional, you must divide your time between your job and your UPSC IAS preparation 2020 and make a proper study plan.

When a warrior is fighting, he is fully concentrated on fighting. Nothing distracts him. You need that same level of mental commitment to fight during UPSC IAS 2020 preparation.

Know the War Timeline: Prepare a Schedule

Mains exam paper has a heavy curriculum especially because of the optional subject which requires post graduation level studies. UPSC IAS Mains exam is held in September/October. After UPSC IAS Prelims in May/June, you will have only 3 - 4 months to prepare for Mains. In Mains, you have to study for 9 papers involving heavy syllabus in subjects like History, Geography, Economics, Science & Technology, Polity & Governance, Ethics, International relations, Social issues, Hindi/any language, English, Essay and optional subject. It is not possible to prepare for the Mains exam in just 3 months. A candidate, therefore, should begin preparation for the Main Exam and then prepare for the Prelim. It takes at least one year for UPSC IAS preparation 2020. A candidate should start his/her preparation in June of the previous year if he/she wishes to appear for the Prelim exam the next year. Here is a sample timeline you can follow.

UPSC IAS 2020 Preparation Schedule

Target Year : 2021

  • Suppose you want to give Prelims in year 2021.

  • Begin your preparation in June 2020.


Time Duration

What to Do?


June to September, 2020

3 months

Optional subject

Begin with preparation of the optional subject which is generally a new subject with little or no overlap with General Studies paper.

October, 2020 to February, 2021

5 months

General Studies (Prelims & Mains)

Prepare for both Prelim and Main exam together as syllabus is almost same

January - April, 2021

Mock test series

Solve previous years question papers for self-assessment of UPSC IAS preparation 202. Also:

  • Either join a Mock test series or

  • Buy a test series and solve it at home

March to May, 2021

2 - 3 months



Prepare for the CSAT along with UPSC IAS 2020 preparation for Prelims. CSAT paper is only qualifying in nature.

May/June, 2021


Give the Prelims exam


June, 2021

1 month

Optional subject

  • Revise your optional subject

  • Join test series for optional subject

July - September, 2021

2-3 months


  • Prepare for GS (including Ethics) and Essay paper

  • Join a test series for Mains papers

September/October, 2021


Give the Mains exam


Note: You can also mix UPSC IAS 2020 preparation for Optional subject with Mains GS subjects as per your preference.

Draw your Arrow and Mark your Aim: Make a Timetable

Make a study time-table to manage your UPSC IAS preparation 2020.

  • The syllabus is vast and you must take care that you give adequate time to all subjects and topics and not ignore any important topic.

  • When you set deadlines, you will be able to work more efficiently and complete your UPSC IAS 2020 preparation and syllabus in time.

  • A planned time-table will give you more clarity on how you will complete your UPSC IAS preparation 2020 - how fast you need to be, how much time you have for a particular topic/subject, how much syllabus remains to be covered. It will allow you to plan your time effectively.

  • Make a time-table that you can follow. Do not make a very restricted time-table that you may not be able to follow after some time. Keep some free time for yourself.

Let us know how to begin studying for UPSC IAS preparation 2020.

Wage the War: Do or Die

How to begin UPSC IAS 2020 preparation?

Start the battle with reading NCERT books and newspapers every day.

How To Prepare for UPSC IAS 2020 from NCERT Books

  • The first step in UPSC IAS preparation 2020 is to get the basic concepts and theories right before you move on to more advanced content. NCERT books are easy to understand and provide content incoherent and precise form.

  • In previous years, UPSC has asked questions directly from NCERT textbooks especially in subjects like Geography, History and Ecology.

  • The candidate should read the NCERT textbooks from classes 6th to 12th.

IAS Preparation Tips 2020 - Reading Newspaper every day

  • Read the newspaper every day.

  • Newspapers and current affairs form an important aspect of the UPSC IAS preparation. The newspapers provide the candidate with an abundant source of knowledge about current affairs in the country and outside. The candidate must read the newspaper every day to keep a track of new developments around the world to remain informed.

  • Reading newspapers is especially relevant for the Mains stage of UPSC IAS preparation as the questions are often opinion based and reading the newspaper every day will help the candidate aware of how things are changing and developing around the world.

When you have completed studying NCERT books, you can move onto standard reference books.

War Strategy Analysis

How would you know if your UPSC IAS 2020 preparation is going in the right direction? How would you assess the effectiveness of your strategy?

How to Crack IAS 2020 Exam Paper: Solving Previous Years’ UPSC Question Papers

The exam questions are known to be unpredictable in nature. For example, one year it may focus on current affairs and a particular subject and another year it may focus on other subjects. But solving previous question papers can help you judge the trends in the UPSC exam paper.

  • You can analyse the type and difficulty level of the question asked. This will help you in strategizing how to do your UPSC IAS 2020 preparation.

  • IAS previous question papers are reliable sources of UPSC CSE pattern, difficulty level and question type.

  • It is also a good source of self-assessment in your UPSC IAS preparation 2020 and help you build a strategy on how to crack IAS 2020.



UPSC IAS Preparation 2020 Tips - Mock Test Series

  • It helps the candidate become familiar with the exam pressure and managing time in answering all the questions.

  • It can help candidates in realizing and learning from mistakes, plan a strategy they need to follow in continuing the UPSC IAS preparation 2020.

The Second Battle of Civil Service Exam: How To Prepare for IAS Mains

Read the below tips on how to prepare for IAS Mains.

UPSC IAS Preparation 2020 Tips - Answer Writing Practice for Mains exam

  • The IAS main exam papers are descriptive in nature and tests the candidates’ writing skills.

  • In the Mains paper, the candidate would be given an answer booklet with a fixed space for writing answers. Candidates have to answer the questions quickly and effectively in minimum words.

  • During UPSC IAS 2020 preparation, writing practice helps to learn to write answers within the space provided in the answer booklet within given time limit.

UPSC IAS 2020 Preparation Tips - Choosing Optional

  • The optional subject accounts for 500 marks in the UPSC final result. Hence, it is important to choose the optional subject wisely.

  • Some of the factors to keep in mind before selecting an optional are:

    • Interest in the subject

    • Amount and nature of syllabus

    • Availability of study material

    • Number of applicants for that particular optional subject

    • Scoring potential of the optional subject

    • Success rate of the optional subject

    • Academic background

    • Overlap with the GS papers

    • Availability of coaching

Which Ammunition will you Use? Bullets, Guns or Bombs

Let us know how to crack UPSC IAS 2020 using different types of study material. Traditionally UPSC IAS 2020 preparation has focused only on books. But these days, advancing technology provides many options to candidates for his/her UPSC IAS preparation 2020. Videos, mobile applications, pictorial flow charts and infographics help in keeping UPSC IAS 2020 preparation interesting.

Sources of Study Material for UPSC IAS Preparation 2020 are listed below:

  • Books

  • E-books

  • Websites (documents, reports and information available on websites of government ministries, national and international organizations, others for various topics)

  • Videos

  • Mobile applications

Note: Remember, UPSC keeps in mind that candidates from small towns and villages may not have 24/7 internet access for their UPSC IAS 2020 preparation. So, many questions come from the ‘static’ theory part available in NCERT books and standard reference books, to give them a level playing field- particularly at the preliminary level. Thus, reading a random internet article may not be useful.

The Do's and Dont's: General Tips on How to prepare for UPSC IAS 2020

Let us know some important tips to prepare for UPSC IAS 2020

UPSC IAS Preparation 2020 Tips on Making Notes

  • It is useful to make short notes during UPSC IAS preparation 2020. The UPSC IAS syllabus is very vast and short notes help to keep track of important points which also helps in effective revision later on.

  • It is important to consolidate information in compact notes form because one night before the exam you will not have time to go through a pile of books.

  • During UPSC IAS 2020 preparation, candidates can make notes in notebooks or loose papers and keep them in files for separate subjects. Writing in loose papers may make it easy for a candidate to add notes to a topic, especially when any current affairs-related news needs to be added to a particular topic.

  • Highlight important lines in a book. You can write important keywords/names/terms/phrases on the margins of the book page.

  • In UPSC IAS preparation 2020, quality of notes is important. You don't need to write trivial things or things that you already remember by heart for eg, you don't need to make a note that “India got independence on 15th August 1947”.

UPSC IAS 2020 Preparation Tips on Revision

  • Revision must be an integral part of UPSC IAS preparation 2020. Today, if you study a topic from ABC book, newspaper or website but cannot recall it in the exam hall after four months, then the whole exercise is useless.

  • UPSC syllabus is vast and diverse. It is natural to forget things that you had studied earlier. Humans have a short-term memory. Whatever a candidate studies one day, he/she can forget the content in the next two days. Revision is important to retain the information for longer periods.

UPSC IAS Preparation Tips on Time Management



Quantify your UPSC IAS preparation 2020 in terms of the amount of syllabus or topics you covered.

Don’t quantify your UPSC IAS 2020 preparation studies in terms of hours you studied.

Do not study for 1 hour and take a 2 hour break after that.

Daydreaming does not count as studying.

Keep your mobile phone switched off or away from yourself when you are studying (unless and until you are expecting a very important call).

Don’t waste time in unnecessary chatting on whatsapp or surfing on facebook or any social media platform.

Don't keep checking your whatsapp or facebook or email every 2 minutes and get distracted.

Take short breaks or off days when you don’t feel like studying at all. Keep your mind fresh and energized.

Don’t let your mood dictate your studies or ruin your study plan.

Stay mentally healthy. Resolve your fights and keep away from people who ruin your mental peace.

Don’t waste time participating in unrequired debates and discussions online or offline with anyone.

UPSC Preparation Tips on Staying Positive

  • The most important aspect of the entire journey of UPSC IAS 2020 preparation is to stay positive and motivated.

  • The constant studies and pressure can be quite overwhelming and you may feel depressed and demotivated. You may also have self-doubts if you have ability to clear UPSC CSE. Believe in yourself. Remove negative thoughts from your head and focus on studying instead of worrying.

  • If you have friends who are doing UPSC IAS preparation 2020, try and use the synergy of both your efforts in studying, making notes and asking questions from each other. Do not think of your UPSC friends as your enemies. The syllabus is so large that group study or two people dividing, making and sharing notes for topics allotted between them can help both of you save a lot of time. You can also test and ask questions to each other. It will make studying fun and motivating for both of you.

The Third Battle of Civil Service: How to prepare for UPSC IAS Interview

The final stage in the UPSC recruitment process is the Interview or Personality Test. Being inducted into IAS places you with the nation’s finest. An IAS officer has immense power and authority and can positively impact millions of lives and development of the country. And the interview board will look for the qualities of a statesman.

  • Personality Test is an important stage in the process where you will be assessed on your personality.

  • Ask yourself how you can contribute to the country and its people, how you can prove your caliber, what changes can you bring.

  • You will also be asked questions about your interests, education and work experience, if any, hobbies, why you want to serve in IAS, what would you do as an IAS officer etc.

  • Your answers must reflect knowledge, maturity and presence of mind.

  • When you go for the interview, you must dress up in formal wear and look presentable.

About 10 lakh aspirants fight for some 1000 vacancies every year. Out of these 1000 vacancies, the top 75 may be eligible for IAS. The success rate is less than 1%. Competition is tough but exams are not friendly to anyone. Everyone needs to fight to survive. Whether you are taking coaching or not, whether you are a first timer or an experienced player in the game of UPSC IAS 2020 preparation, you have to adapt to the unpredictable nature of UPSC civil service exam and study hard. Remember, UPSC IAS preparation 2020 is not about just studying hard. It is as much about studying smartly. “Success comes to those who work hard and never give up.”

You are a warrior. Your aim is to win the battle. Not to lose and die. You may feel wounded if you don't clear Prelims or any stage of exam but you must get up quickly to fight again. The only reason a warrior fights is to win. And victory is sweeter when combined with sweat and blood.

Frequently Asked Question (FAQs) - How To Prepare for UPSC IAS 2020

Question: Is 1 year sufficient for IAS preparation?


Generally, it depends on individual knowledge and personal qualities such as concentration, memorizing capacity etc that may determine how much time he/she would need. But given the vast syllabus, it takes about 1 year to prepare for the UPSC IAS exam.

Question: Do I need coaching to clear the UPSC IAS exam?


No, many toppers have cleared the UPSC Civil Services exam with self-study without any coaching.

Question: Is the UPSC IAS preparation difficult?


The vast syllabus that requires to be studied as well as remembered, the long hours of studies, etc makes UPSC IAS preparation difficult.

Question: How many hours should I study for IAS?


The number of hours you need to study depends on your productivity, efficiency and memorizing capabilities. A lot of people recommend studying for about 15 hours per day during the UPSC IAS preparation, but some people have cleared UPSC civil services exam with just 6-7 hours of daily study time as well.

Question: How can I start preparing for IAS at home?


Go through the UPSC IAS syllabus, get a list of recommended books for Prelims and Mains, decide the optional and start reading, making notes and revising at regular intervals.

UPSC Civil Services Exam Updates and Articles

Questions related to UPSC Civil Services Exam

Showing 1144 out of 1144 Questions

i want to be an ias with a backup plan what should I choose ba or bsc

chinmayi 28th Mar, 2020


All The Best as you have a dream to become an IAS  . I suggest you to take B.Sc as there is science stream in your class 11 and 12 . You have many opportunities as you can do M.Sc or PhD after doing B.Sc . You have an opportunity if you fail to achieve your dream of an IAS officer . If you don't get selected for IAS then you have a chance of becoming professor .

Dream to become an IAS but have an other option also in your career . You should work very hard to become an IAS . But concentrate on your degree as Degree is most crucial to become an IAS as without a degree you are not supposed to write the prelims exam .

Hope this helps you .


if agri is the correct graduation for IAS /

Papeya Dubey Student Expert 28th Mar, 2020

First of all,according to eligibility criteria for UPSC,candidates need to pass graduation in any discipline and attained 21 years age, you can appear even in your final year,there isn't any best course or correct course in this matter, the sole reason being UPSC doesn't discriminate among aspirants and hence allow people from all background to appear for this exam. As per previous year trends also,people from different backgrounds like engineering, medical etc too have succeeded, what eventually matters is planning and strategy in this exam.

what are the groups in intermediate which is best for ias?

Megha 28th Mar, 2020

Hello Aspirant !

I will suggest you to first choose wisely your undergraduate and start preparing from starting itself.

Then , choose your subjects according to your preparation and interest that what subject you will take as an optional subject in your exams

Many people go for subjects in ART stream like bachelor of art with subject like geography , history , political science etc according to your interest .

Also , you can try for humanities.

Hope it helps , if you have further query please feel free to ask !


i want to become an after finishing my hsc second year which is the better course for my brightfull future?

Papeya Dubey Student Expert 28th Mar, 2020

In order to appear for UPSC, you just need to be 21 years old and passed graduation in any discipline from a recognized university,you can apply even in your final year. UPSC doesn't discriminate among aspirants and hence allow people from all background to appear for this exam.

See, it's important to understand where your interest lies, and accordingly choose career path. As UPSC is more humanities oriented, it's becomes comparatively easier for arts students to prepare for this exam as they're already well acquainted with this syllabus while science students didn't have any of these subjects at +2 level. But, let me tell you as per previous year trends, many people belonging to engineering and medical too have succeeded, and the only reason being eventually it's the planning and strategy that matters. So, think out clearly about your areas of interest, if you're absolutely clear about UPSC and have liking for any arts subject such as law, political science, history, economics etc you may go ahead, secondly if you're not sure, go with your choice it may be medical, management, engineering or anything else, even if you later feel like giving UPSC,  you can definitely go ahead after gaining some experiences in your related career field like so many successful candidates have done in the past.


I want to start my IAS preparation from home other than going to coaching centers.i want to write this exam in the year 2023 as I was born in march 2002,is it right?..which books help me for write the preliminary & mains better.i want to study in a smart way rather than spending a lot of time in it.

Aditi Amrendra Student Expert 26th Mar, 2020

The eligibility criteria for appearing in UPSC civil services examination is to have a graduate degree and age above 21.First of all you should start studying newspapers daily either The Hindu or The Indian Express.
Every topper recommends that your resources should be limited because there are tonnes of materials in the market and indulging in each one of them will waste your time and you will get confused ending up in messing everything.
There are few standard books recommended by toppers,these are :
  • NCERT books from 6 to 12.
  • Laxmikant for Polity
  • Spectrum fo Modern India
  • Tamil Nadu board book of class 11th for Ancient and Medieval india
  • Shankar IAS book for Environment
  • GC Leong for Gerography
  • Ramesh Singh for Economy.
  • Nitin Singhnia for Art and Culture
Apart from that keep and eye on everything happening around world and be curious.
For Mains,GS 1,2,3 above books and current affairs and for GS 4 you should study Lexicon.Apart from that you should study ARC Reports,NITI Ayog action agenda,PIB,PRS,Indian year book,Budget and Economic survey(of the year in which you will appear in the exam)

Good Luck
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