Hello

Unfortunately,  we don't provide  study materials for UPSC examination but yes the top study materials or books which you can follow for UPSC examination preparation are listed below subject wise , you can buy these at your near buy book shops :-

HISTORY

*NCERT XI (Ancient & Medieval)
*NCERT XII (Modern Indian History)
*Facets of Indian Culture Spectrum
*From Plassey to Partition - A History of Modern India

Indian Art & Culture

*Indian Art & Culture - Nitin Singhania

Polity

*NCERT IX-XII
*Indian Polity M Laxmikanth

Geography

*NCERT VI X (Old Syllabus)
*NCERT XI, XII (New Syllabus)
*Certificate Physical Geography G C Leong
World Atlas

Economics

NCERT XI
*The Indian Economy Sanjiv Verma
*Indian Economy by Ramesh Singh
*Economic Development & Policies in India Jain & Ohri

Environment

*Class XII Biology (last 5 chapters)
*Environment by Shankar IAS Academy

International Relations

*NCERT XII (Contemporary World Politics)
*Current Affairs ( read newspaper )

To get the complete list of books go through
https://competition.careers360.com/articles/books-for-upsc-ias

Qualifying UPSC examination is quite difficult considering the competition involved but if you remain dedicated and focused towards your preparation then you can definitely crack it.

Follow the below tips

*Make a routine or a time table and try to give at least 8 hours to studies , keep short breaks of 20 to 30 minutes after every 2.5 to 3 hours

*Read newspaper daily and keep yourself updated with the current affairs

*Choose your optional subject wisely , choose the subject you have interest in.

*Make short notes after completing each chapter

*Revise :- there's no point of preparing for the exam if you couldn't recall anything in the UPSC Examination so you should stress on revision as well.

*Solve previous year question papers and mock test papers ;- You should solve these , it will give you idea of types of questions asked and their difficulty level and will help you a lot.

*Also work on your communication skills and personality development as it plays an important role in your interview round

For more tips go through

https://competition.careers360.com/articles/how-prepare-for-upsc-ias

Thankyou