Stress Free Sudoku Game Book!

"Stress Free Sudoku Game Book!" is a popular free sudoku game with over 200,000 puzzles and 5 difficulty levels. It offers a relaxing experience with no timers or penalties, and includes features like full undo support and a dual-keypad input system. The game boasts easy-to-read numbers and pencil marks that are automatically erased as you enter answers. Users praise its large number of puzzles and lack of pressure, making it a great choice for sudoku fans.