From easy-as-pie to brain-crushingly difficult, The Sudoku Block features over 650 pages of Sudoku puzzles that will challenge your noggin when it’s in need of some exercise in a fun and portable “block book” format.<BR><BR>With over 650 pages Sudoku puzzles ranging in difficulty from easy to expert-level, this fun block book is the perfect gift for seasoned Sudoku lovers and beginners alike!