here is a free PDF e book called Kasparov openings. It is not very clear but a good start for you & you can grab it soon after you read this:
https://notendur.hi.is/adl2/Otto%20Borik%20-%20Kasparov's%20Chess%20Openings%20-%20A%20World%20Champion's%20Repertoire.pdf
For 1500-1600 Player, Which book do you recommend?
A. My system
B. Think like a grandmaster
If [Think like a grandmaster] is difficult for 1500+ player,
When do I have to read it?