sir kon sa book shi ha iit ka lin
IITs take the admission through JEE Advance. For the exam preparation I would suggest you first NCERT books as it will help you to clear your basic concept. The other books you can prefer-
Physics:
Concept of Physics by H.C. Verma
Fundamentals of Physics by DC Pandey
Chemistry:
Numerical problems in Chemistry by P. Bahadur
O.P. Tandon
J.D. Lee.
Mathematics:
Mathematics by R.D. Sharma
Trigonometry by S.L. Loney
Algebra by Hall & Knight
Good luck!