The Times Ultimate Killer Su Doku Book 13: 200 of the Deadliest Su Doku Puzzles (the Times Ultimate Killer)

The Times Mind Games

Quiz your family at home with crosswords, puzzles, and games. 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 mettle. Prepare yourself for the toughest Su Doku challenge there is. These diabolicall...