This New Patter JEE problem is best book.. much much better than maths and chemistry one. Quality level problems segregated according to JEE advanced and Mains.
Thus Enhancing the preparation.
And most importantly crisp and detailed solutions of questions are given after referring to them you can clear your doubts.
It might seem a paid interview but I wrote this because I scored full in physics paper in my academy , most of the people struggled to cross 80 percent marks.
Credit Goes to DC pan...

Basically for question practice.

Book is very good

Good product