The puzzles in this collection of treacherously difficult puzzles will stretch even the most advanced Su Doku enthusiast. You will need to use all of your best

Samurai is for anyone who wants to enjoy extra-challenging extended-length Su Dokus. If you regularly relish number puzzles but they are solved within minutes,

Back Again for the Holidays: Will Shortz's Little Black Books of Puzzles

Killer Su Doku poses an even greater challenge than the Fiendish Su Doku puzzles.Here are 100 previously unpublished puzzles for hard-core Su Doku addicts.

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