Sudoku Puzzle Book for Adults: 3000 Hard to Very Hard Puzzles with Full Solutions - Vol. 4 Paperback ? September 24, 2024 by Sudoku99 Team (Author)

Looking for the ultimate Sudoku challenge? The Sudoku Puzzle Book for Adults: 3000 Hard to Very Hard Puzzles with Full Solutions - Vol. 4 offers a thrilling mental workout for experienced solvers. With 3000 puzzles ranging from hard to very hard, this collection will keep your mind engaged and sharpen your logic skills.

Key Features:
- 3000 unique puzzles with difficulty levels ranging from hard to very hard
- Full solutions provided for easy reference and progress tracking
- Play online: Solve the same puzzles on Sudoku99.com by entering the Sudoku ID from the book
- Large 8.5 x 11-inch format for clear, easy-to-read puzzles.