I whole heartedly disbelieve that Out of the Labyrinth: Setting Mathematics Free by Bob and Ellen Kaplan is entertaining. BUT, there are math scholars and people who don’t care about math that tell me their work is phenomenal. This cannot change the fact that it is about math, but it does prove that I am constantly wrong about math. I am not good at it. Therefore, if people who are right about math can recommend this to me, then I can strongly recommend this book to you.
It is sort of aimed at educators, but it is recommended for anyone who would like math to be interesting. Like me. So I’m going to peruse some of their other work with the Math Circle (these Kaplans are way famous). If the Math Circle in practice or concept catches your attention, you might want to grab Out of the Labyrinth and turn some pages.