Generally student , who study for preparation of iit not purchase a single book…they purchase different book for different categorized part of each individual subject…but still for scoring good rank basic must be clear …for cleaning basic u must have command on whole NCERT book of PCM… if your basics clear & if u have done enough selfpractice on solving sample questions …then by only these small effort u can score mark almost near by cut off or u may cross cut off…but for scoring these only these are not enough …u should do lots of questions from different famous books …u should think how u can make your own short cut method …try to do que by different method that u learn by selfstudy not by a single method which is tough by your teaachers …by doing this your thinking capicity increases & u can able yo think something different how to solve question which u r facing like new que which u never seen before …

JEE Book Guide:

Physics: Start with HC Verma. Then go ahead with IIT JEE Questions directly. Dont go for any other crap books.Also other books from Arihant and GRB are good .. However if u have time left after doing previous years, you can solve Irodov, Resnick, Krotov etc !

Chemistry: NCERT most important. Other than that, for reference, use OP Tandon, MS Chouhan, Pradeeps, Morrison and Boyd, Himanshu Pandey, P Bahadur, SN Sanyal etc. Other books from GRB and Arihant are also good !

Maths: Start with NCERT, RD. Then go ahead with A Das Gupta, MCQ in Maths, Advanced Problems in JEE (Balaji) and then previous year questions from Arihant 39 years !etc More books of Arihant and GRB can be used if needed.

Practice previous year IIT JEE questions MANY TIMES (You can use Arihant 39 years for that ! ) . Become perfect in them. Solve other people’s doubts. These will help you score better :). People run after so many modules and crap test series. Instead you should focus on limited material and do it more number of times !! Many questions ask only basic concepts but a good clarity in them. Self study is definitely most important. But coaching really helps you score more