This book claims to be a guide to a few interesting puzzles and paradoxes of finance, but in the end the half dozen problems came across as somewhat weak. It's a smallish book, and I never really connected with it, as it attempts to explain things that could be explained quite simply mathematically through woolly examples which I suspect would convince neither mathematicians nor the numerically-averse. In summary, it teaches you to distinguish arithmetic and geometric mean, and learn about risk preferences, if you don't want to get confused. And that's about it.
And then I read the blurb on the back, and find it recommended by 3 major economists. I'm not sure what that says.