Hey!

There are some book lists available in the link https://school.careers360.com/articles/kvpy-books-know-best-books-for-preparation to prepare.

To get the pdf of NCERT Books - https://ncert.nic.in/textbook.php?jesc1=1-16

You can also download book pdf from https://www.pdfdrive.com/fundamentals-of-physics-textbook-d33735280.html

You can also check out https://school.careers360.com/articles/how-to-prepare-for-kvpy for more info.

Hope this helps.

Thank you.