It's a really interesting method, but it's quite laborious and that's why most people won't use it. I think the best way to understand a book or to make it stick in your mind is to reread it. With each reread, you feel like you are reading a different book. The best way to imprint something on your mind is through repetition. I think it is more practical to apply the method I mentioned. Of course, this is just my opinion. Everyone can think differently.