Apparently, his method is very famous. In fact, he created a chess school in the URSS from which important players such as Kasparov himself would come out.
I take note of the book that I add to my list. Thank you!
Of course, he mentioned him in the book.
Recently I started to study Botvinnik's method of preparation as a beginning of the preparation against my opponents. Surprisingly enough, I like it. Of course, it is just a beginning but later on I want to switch gradually from Botvinnik to Kasparov.
Maybe someone will find it useful.