mental_floss Sudoku

Enjoy fantastic sudoku puzzles from a renowned expert with this book that every sudoku lover will flip over.Sudoku super-master Frank Longo and mental_floss, the magazine for trivia lovers, bring fans a collection of superb puzzles sure to stimulate the brain. Longos puzzles are always top-notch, and because these increase in difficulty as the book goes along, they're perfect for helping solvers build their skills.