邦訳：2021年1月・森北出版New in paperback. Hardcover was published in 2019. This lively and compelling book offers a unique, multifaceted perspective on mathematics by demonstrating 99 different proofs of the same theorem. Each chapter solves an otherwise unremarkable equation in distinct historical, formal, and imaginative styles that range from "Medieval", "Topological", and "Doggerel" to "Chromatic", "Electrostatic", and "Psychedelic".