300 Extra Hard Sudoku Puzzles: Active Brain Series Pocket Book

Active Brain Series Pocket Book 4 contains 300 extra hard sudoku puzzles in a compact size you can take everywhere with you. Sudoku is a fun way to exercise your brain and there are plenty of puzzles in this book to give it a really good workout The book is 8.5" high by 5.5" wide and has 2 puzzles per page.