What are the best books that can be referred to, for JEE Mains and Advanced?

You can refer below 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



Trigonometry & Geometry



1- Plane Trigonometry Part 1 by S.L. Loney

2- Plane Co-ordinate Geometry by S.L. Loney



Algebra



1- Higher Algebra by Hall and Knight

2- Problems in Calculus of One Variable by I.A. Maron



Chemistry-



1. Organic Chemistry by Paula Bruice Yurkanis

2. Organic Chemistry by O.P. Tandon



Inorganic Chemistry



Chemistry XI & XII by NCERT