@ akash
for iit u need to do hard work , frst of all , the 2nd thing is clear and crystal concept is required for that , beacuse in jee adv u wont be able to solve any quyes if u dnt have that .
and for books i can say donot follow more than 1 ref books per subject except ncert as diff author have diffrent approach to explain the same concept , but u will end up getting time loss and confusion also .
I AM GIVING THE FOLLOWING BOOKS , FOLLOW IT
PHYSICS
1- CONCEPT OF PHY BY H C VERMA
2= UNDERSTANDING PHY BY D CPANDEY
3- PROBLEMS IN GENERAL PHY BY I E IRODOV ( FOR ADV ONLY )
CHEMISTRY
1- ORGANI CHEMI BY MORRISION AND BOYD
2- INORGANIC CHEMI BY GRB PUBLICATION
3- PHYSICAL CHEMI BY P BAHADUR
MATHS
1- OBJ MATHS BY R D SHARMA
2- MATHS BY A D DAS GUPTA
3- MATHS BY M L KHANNA ( ONLY 1 FROM OPT 2 AND 3 )
ALL THE BEST ..