Enjoy the most popular puzzle game in the world! whether you want to keep your brain young and active, develop logical thinking or just keep yourself busy to avoid boredom... this book will help you with its unique Sudoku Puzzle. 200 Unique sudoku puzzles and solutions.2 Puzzle per pageLarge Print easy to read for seniors.8.5 x 11 (inches) 21.59cm x 27.94cmPerfect as a gift for sudoku lover for any special occasion! (Christmas, Birthday, Travel trip)