Anyone who gambles, plays cards, loves puzzles, or simply seeks an intellectual challenge will love this amusing and thought-provoking book. With wit and clarity, the authors deftly progress from simple arithmetic to calculus and non-Euclidean geometry. Their subjects: assorted geometries—plane and fancy; famous puzzles that made mathematical history; tantalizing paradoxes; and more. "Charming and exciting"—Saturday Review of Literature. 169 text figures.