Hello There ,

I would request you to go through the following careers360 article as it contains  detailed information on KVPY preparation strategy .

https://school.careers360.com/articles/how-to-prepare-for-kvpy

Some Of the best books for KVPY exam are -  .

physics -

• Fundamentals of Physics by David Halliday

• Robert Resnick, Jearl Walker; Concept of Physics by DC Pandey

• Tata Mc. Graw Hill’s Book by HC Verma

chemistry -

• Moderns ABC of Chemistry for Class – XI With CD by Modern Publishers

• NCERT Physical & Organic Chemistry by OP Tandon

Biology -

• Biological Sciences by Taylor Green and Stout by Cambridge Publications

• Elementary Biology (Volume – 1) by K.N. Bhatia

• M.P. Tyagi; Publisher: Trueman

mathematics -

• A Das Guptha, Mathematics for class XII

• Problem in IIT Maths by R.D.Sharma

hope it helps and All The best .