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Hailed as the classic guide to problem solving, this book did quite a good job at categorizing the ways of looking at a problem, and some general methods of solving and treating them. However, I think I read this at the wrong time - it could have fascinated me much more had I read it in the early 2000s (then again, there was not any translation to Vietnamese back then, and I suspect my mediocre English back then would not let me finish it).

Still, the way I went at the book is that I skimmed through most of it, only stopping at the particular instances I found new/ relevant/ interesting. I skipped a lot of the examples (I know, I know, I'm still feeling guilty about it!) , regardless I found many good gems in the long stretch of text. The creator's paradox, for example, is something I've learned the hard way, but seeing it packed into a concept helped organize my thinking a lot.

I would have given it a much higher rating as a middleschool to highschool student.

I like the chapter at the end though. Fun questions.