Editors of Nikoli Publishing

A year of Sudoku puzzles hand-crafted by Nikoli, the Japanese company that invented the game. THE BEST SUDOKU: Every puzzle in this calendar is created by Nikoli, the best Sudoku makers in the world not a computer to balance toughness and solvability and keep you hooked. TRAIN YOUR BRAIN: The week begins with the easiest puzzles and the difficulty increases...

Prepare to be obsessed. Match wits with the experts who created The Original Sudoku. Arranged from Easy to Very Hard, here are over 300 logic puzzles that celebrate the compulsive joy of Sudoku with symmetry, smartness, and elegance—qualities lacking in computer-generated puzzles. It's fiendish fun as every puzzle is designed by an author who anticipates your next step and obscures...