Yes it is the only thing that matters after your coaching class.
If you perfer heavy books with 1000 pages and full of extra knowledge then definitely you may not preform well after putting your effort at maximum level.
As I mentioned in my early answers NCERT is best book and for reference you may refer books like H.C.VERMA,D.C.PANDEY,MS CHAUHAN and for biology you may refer OBJECTIVE NCERT by MTG publication.