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

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

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

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,

A brand-new collection of Killer Sudoku puzzles, the popular variation that adds an extra element of puzzle-solving fun. Our third collection of Pocket Posh Kil