This is an espionage thriller in which a cryptographer reluctantly helps the military break a mathematical code. It gets high ratings from those who enjoy this sort of cloakanddagger stuff. Moreover, the author has worked as an engineer and so has a pretty good grasp of mathematics. But, unlike some other works listed on this site which really do something deep with the math or say something about mathematics, here it is essentially a gimmick. The protagonist struggles to break the code until she eventually has a realization about systems of equations that allows her to succeed. I don't think that there is enough there to interest people who like to see a lot of math in their fiction. On the other hand, if you're looking for a good adventure story and would appreciate the fact that math gets mentioned a few times, then do read this book. (And when you do, please come back to this site and post your own ratings and opinions about it...especially if you disagree with my assessment!)
