Greetings of the day aspirant !!

I am hoping that you are absolutely fine. See, i would like to say that you have to read about 40-44 books in total, and it would take you about three days to complete one book which contains about 14-16 chapters. Now come to the question that which are relevant to study from ncert so I would like to suggest you that you will study from Ncert that is geography. Geography portion is much enough from ncert.

I hope it helps.

All the best :-):-)