If you watch the TV show Numbers, you'll enjoy reading this book. If you read this book, you'll enjoy watching the TV show.
My wife, who hates math (and is admittedly very poor at it), and I, who love math, both started watching this show from the first episode. She enjoys the show as much as I do. This book, which uses some of the episodes from the show for illustration, does a very fine job of discussing some of the mathematics used on the show. But it does more than that. It discusses the mathematics used by real law enforcement, the CIA, NSA, FBI, courts, etc.
I think one of the strengths of this book is that it corrects a misunderstanding about mathematics, which is that mathematics is identical to arithmetic. Or another misunderstanding, which is that math uses just numbers. Math is much more than that; it's more than algebra or geometry or even calculus. This book discusses a few of these additional areas, such as graph theory, geographic profiling, and Bayesian inference. It has just enough math to be interesting to the wannabe mathematician (like me) and enough good explanations and analogies to be interesting to everyone.