Are you tough enough? Take on this collection of 200 devilishly difficult sudoku puzzles and find out! Includes: - 200 hard puzzles- Perfect portable size- Edited by Will Shortz
- ISBN10 0312541635
- ISBN13 9780312541637
- Publish Date 3 March 2009
- Publish Status Active
- Out of Print 16 April 2011
- Publish Country US
- Imprint Saint Martin's Griffin,U.S.
- Format Paperback (US Tall Rack)
- Pages 320
- Language English