The science and math of football and rugby are illustrated in accessible, colorful graphs in the new book, "Bounce, Roll, & Fly: The Science of Balls: Volume 7" by M. Schottenbauer, Ph.D. This book, seventh in a series on the science of balls, focuses on the motion of an official football and regulation-size rugby ball. Graphs show these two balls turning, spinning, rocking, rolling, falling, bouncing, and flying! This book can be purchased from Amazon and affiliates at discount retail, and CreateSpace at retail and wholesale prices, in both English and German translation. Additional information is available at the Schottenbauer Publishing website.