I bought this as my first book in SmartGo Books (which so far is far more enjoyable to read than any paper book). So far I've found it very interesting, but I'm not very sure about what to do with it. I've been "reading" it, i.e. skipping pages and looking through the diagrams. In some of them, I've actually checked other answers (in some I have some doubts even...), but I'm not sure how to get the most of it. Too unstructured, although Sakata's writing style is pretty nice and makes up for it... Also the huge amount of information stored in this book... Which I want to get into my head
There's some clever moves in the problems and it's better to get exposure to them if you've never seen them before than trying to work them out from first principles as part of the problem.