Book of Donmon Teith

Are you a fan of amazing Japanese puzzles? This book is the perfect antidote for rainy days, boring evenings when there's nothing on TV, or for those long commu

200+ supercharged Sudoku to test your skills--and boost your brainpower! Whether you're already a pro or you're looking to build your abilities, The Toughest Su

These popular logic puzzles from Japan are taking the world by storm. Sudoku looks like arithmetic but requires just logic. While the rules are simple, the solu

(Tripod Sudoku) is a variation of sudoku, where the borders of regions are not defined. The goal is to fill the grid with digits and divide the grid into region

(Tripod Sudoku) is a variation of sudoku, where the borders of regions are not defined. The goal is to fill the grid with digits and divide the grid into region