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The Times Ultimate Killer Su Doku Book 15 - 200 of the Deadliest Su Doku Puzzles
Challenge your brain with these enjoyable puzzles. 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 diabolically difficu...
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