Life is not a heck of a lot of fun when you live in a trailer park on a small California coastal island that's home to an underground nuclear plant. It gets even less fun when people start disappearing for no reason. Then Malba Clarke--unofficial math tutor for several island children--disappears, and the kids decide enough is enough. They're going to find out what's happening, and it seems as if Mrs. Clarke has left them a clue--an obscure, mathematical clue that challenges their brains and leads them to secrets about the island they never knew, and (of course) dangers they anticipated all too well.

I can see why this book would not appeal to everyone, with so much of the mystery based on math, but I thought it was fun. The characters were quirky and sympathetic (and mostly named after famous mathematicians), the setting unusual and well-planned, and the mystery believable. The perfect book for all the young math geeks in your life!