Firstly start with basic understanding of all subjects like sci( 6-12 ),ecology and environment, economy, history, polity, etc which will give u basic knowledge about this precious subject. and complete in 2-3 month if u r not going to take exam in 2021-2022 .after this make time table of imp sub and choose suitable place to study in perfect manner .with this start reading of one newspaper like the Hindu or Indian express. and watch video on YouTube about the current seneario on all India radio, pib, some debates on hot topics. it will cover yur current affairs portion. and here remember one important thing that's u hv to write all factual news on yur notebook with in 30 mins. ok then moves another subject such as Indian polity by laxmi Kant read it carefully, for history u hv to focus on 4 parts like ancient history by rs sharma, medival by satish Chandra, modern history by bipan Chandra or u may purchase spectrum (summary) are given here. art and culture by Nitin singhania and lastly world history I hv no idea about their author u can refer books to see on Google. it will develop yur mentality regards history. then international relations notes refer by Cafe or specialist stationary. sci and Tech notes by coaching. ethics by lexicon. geography by gc leong or may be majid Husain. that what I know about the whole books regards upsc civil service exam.
I hope you will be understood as per my usual understanding.
Thanks mam.This gives a motivation for my preparation.And also thanks for sharing the important books list.Now i can start my preparation by reading 6-12books. I am not take exam on 2021-2022 i just completed my 12th standard. mam one things say what is optional subject how can i choose it. And once again thanku mam
Acc to yur choice but as per my suggestion (( 1))psir (political science and international relations) advantage is modern history discuss here some parts of ethics also and totally international relations with politics also .or(( 2)) public administration these two optional will gv u weightage in mains and interview both these two subjects is directly related to civil service or management. otherwise u can choose some other optional like geography, economy, mathematics any regional language, botany, sociology, psychology, and so on. at the last it depends upon u which subject is favraote and u can gv Tim to that sub fr longer time that I wanted to say. thnku I hope u enjoyed it.