The content of this book about the history of pi is interesting, however it tends to be choppy and overly general. I have a math minor, and I was disapointed at it's lack of depth exploring some of the various equations used to reach the number pi. The thing that bugged me the most was the green graphics on every single page. Great, I suppose if you only read one page at a time, but more than that and you wish they would stop drawing green circles and just get on with the story.For a fun math book, I much more enjoyed Charles Seife's book on Zero or David Bodanis's book on e=mc^2.