Once you've mastered the easy puzzles it's time to take it up a notch! Includes: - 200 medium-level puzzles- Perfect portable size- Edited by Will Shortz
- ISBN10 0312541627
- ISBN13 9780312541620
- Publish Date 3 March 2009
- Publish Status Active
- Out of Print 2 July 2016
- Publish Country US
- Imprint Saint Martin's Griffin,U.S.
- Format Paperback (US Tall Rack)
- Pages 320
- Language English