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,

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

Hot on the heels of the first two volumes,Kendoku: Extremeshows that when it comes to mind-bendingly difficult logic/arithmetic puzzles, too much is never enoug

Are you ready for Sudoku without numbers? This book delivers with bodacious collection of 500 "Word Sudoku" puzzles. It's easy enough to "translate" any convent

Specially compiled to provide the most deadly Su Doku challenge, this is the only volume for Su Doku enthusiasts who need a puzzle that really tests their mettl