hi,

a single book won't help you to score below 1000, that said try focusing as much as possible on maths and chemistry mainly.

Read IPE textbook for chemistry, its the best or refer Narayana/Sri Chaitanya materials. In maths, you need to solve the previous years’ questions, suggested book material is narayana material (upto Level 3) to have a better grip over the concepts.

For physics If this subject  interests you the least, then read the topics which you understand and seem easy to you, Don’t focus much on the difficult areas here.