Sudoku fans everywhere have spoken and they are eager for more challenging puzzles. This book of 100 mind-melting puzzles is for the bravest sudoku solvers! Grab a pencil and match your wits against the hardest puzzles the Puzzlemaster has to offer. It features 100 super challenging puzzles. It is edited by legendary New York Times crossword editor Will Shortz. It features big grids with lots of space for easy solving.