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From Nikoli, the Japanese puzzle company that created the sudoku craze, comesa title that starts at hard and goes to a level of difficulty not seen in anyprevio

“The Best Puzzles Are Made by Happy Employees.” So Ad Age describes the credo of Nikoli, the Japanese puzzle company that invented the Sudoku craze and supp

Expert Sudoku is an all-new collection of handcrafted puzzles for the expert puzzle-solver. This is the book that challenges skilled solvers and Sudoku-lovers a

"The Big Book of Visual Sudoku" reinvents the world's most popular number game by adding a second visual layer on top of the traditional number/logic puzzle--us

Puzzlesmiths of all skill levels will find original logic puzzles that will flex the brain, challenge assumptions, and entertain for hours. In addition to offer