Just when you thought it was safe to pick up a pencil Killer Su Doku is based on the original Su Doku grid, with the same rules and numbers—1 to 9—but with

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

In this new installment of the popular, puzzle-based series, Kate has settled into her new life running the Avondale Puzzle Museum in Granville, New Hampshire.

From krazydad, constructor of the wildly popular and addictive puzzles published in The New York Times as Two Not Touch, here are 360 of your favorite Star Batt

Killer Sudoku Puzzle Book If you like Sudoku but want an extra challenge then you will love Killer Sudoku. Killer Soduku (also known as killer su doku, sumdoku,