What are the important books for IIT preparation

Below are the recommended books for your preparation-

PHYSICS

1-Concepts of Physics Vol I and II by H.C. Verma
2-Fundamentals of Physics by Halliday, Resnick & Walker
3- Problems in General Physics by I.E. Irodov

MATHEMATICS

1- Maths XI & XII by R.D. Sharma
2- Plane Trigonometry Part 1 by S.L. Loney
3- Plane Co-ordinate Geometry by S.L. Loney
4- Higher Algebra by Hall and Knight
5- Problems in Calculus of One Variable by I.A. Maron

CHEMISTRY

1- Physical Chemistry by O.P. Tandon
2- Organic Chemistry by Paula Bruice Yurkanis
3- Organic Chemistry by O.P. Tandon
4- Inorganic Chemistry- Chemistry XI & XII by NCERT