Outstanding book. I've read a lot of popular science books -- mainly because I'm interested in science, and not necessarily because I expect it to be a laugh-out-loud experience. Well, this book is. Hilarious in parts, and incredibly interesting throughout, it's a really great read. I was apprehensive about a 'pure' maths book, as I'm more of an 'applied science' girl myself, but it's wonderfully easy to understand and it gets you right to the curious, interesting, wondrous bit of mathematics, without the (to some, tedious) hassle of working stuff out.
Definitely recommend!