dear amit
ncert is most imp for mains but not for advanced , for advanced u need advanced level prep .
generally for chemistry , ncert is good .
for physics , its all about h c verma , thats more than enough for mains .
i am enlisting the imp books here
PHYSICS
1- concepts of phy by h c verma
2- problems in general phy by i e irodov
CHEMISTRY
1- physical chemi by p bahadur
2- organic chemi by morrision and boyd
3- inorganic chemi by by o.p tandon ( grb publication
MATHS
1- maths by m l khanna
2- last 37 years paper of iitjee
HOPE IT CLEARS
REGARDS