Crack open this book to sharpen your logic and reasoning skills. These literature-based math mysteries take just one minute to read. The brainteasers are entertaining --but even better, their real-world connections help kids see math concepts and quandaries as approachable, learnable and solvable. A fun way to develop deductive reasoning skills and discover the joys of math! Featured on NPR. Recommended by Science News. A NSTA Recommends title. Finalist, International Best Books Award. Ages 10-14.