Will Shortz Presents Puzzle-a-Day: Hard Sudoku: 365 Challenging Puzzles
Macmillan, Jul 5, 2011 - Games & Activities - 464 pages
Will Shortz Presents Pocket Puzzle a Day: Sudoku is the perfect travel companion. It's stylish and compact design makes it easy to bring along on any trip whether it's your daily commute or holiday vacation. The pad allows you to access puzzles easily and the hardcover proves a sturdy solving surface.