A good puzzle is ingenious, frustrating and a-ha!-inducing. In this entertaining and utterly addictive book, Bellos will challenge you to pit your wits against pangrams, hidatos, chessboard puzzles and a Singaporean schoolchild’s maths paper. Piece of cake, right? Only if you know the scientific method for cutting cake correctly. Organised from easy-peasy to ninja level – with stories of puzzle mysteries, histories and scandals along the way this book will make your hippocampus happy.