Dash and Rudy are fifth-graders at Euclid Elementary. Dash is a mathematician. Rudy is a standout track athlete, but she's also a mathematician (she just doesn't know it yet). When circumstances result in Dash moving in next door to Rudy, they discover a common interest in mathematics, and a friendship blooms. The Euclid Police need a mathematician's help when a string of burglaries occurs in a very mysterious pattern. Are Dash and Rudy up to the challenge? Can Dash repair a broken relationship? Can Rudy overcome a mishap on the track? Can guinea pigs swim? Open this book to find the answers to these questions and more! And that's not all! A copy of Dash's math notes is included in the back of the book in case you want to read more about the interesting mathematical curiosities from the story.