Only the bravest sudoku solvers should dare to dive into Will Shortz Presents The Little Orange Book of Harrowing Sudoku. Edited by puzzlemaster Will Shortz, the 335 devilishly difficult puzzles in this spooky spiral bound edition is sure to keep you up at night! Features:- 335 sudoku puzzles, arranged according to difficulty- Sleek design with a covered spiral binding makes it easy to solve puzzles- Durable hardcover protects the book as it travels with you wherever you go- The perfect Halloween gift- Edited by Will Shortz