Expert Sudoku
Pit your brain against a Sudoku master's. From Nikoli, the Japanese game company whose puzzles are unmatched in pure, compulsive entertainment, this book challenges skilled solvers with more than 300 logic puzzles all rated "difficult."  Every one is hand-created by an expert who draws you in with symmetry and elegance, predicts your every move, and adds just enough twists and surprises to make you sweat--until the numbers fall into place and ahhhh. . . sweet!