Sudoku Puzzle Book for Adults - 300 Puzzles - Easy: Large Print Sudoku Puzzles for Beginners - Paperback

The Big Book of Numbrix 10x10 - 1000 Puzzles - Easy to Hard: Number Logic Puzzles - Brain Games for Adults with Full Solutions - Paperback

Hard to Extreme Sudoku - 300 Challenging Puzzles - Volume 1: Hard, Very Hard and Extremely Hard Puzzles for Sudoku Experts - Paperback

Hard to Extreme Jigsaw Sudoku - 300 Challenging Puzzles - Volume 1: Irregular Sudoku Puzzle Book for Adults with Solutions - Paperback

Hard to Extreme Jigsaw Sudoku - 300 Challenging Puzzles - Volume 3: Hard, Very Hard and Extremely Hard Irregularly-Shaped Sudoku Puzzle Book for Adult - Paperback

Hard to Extreme Jigsaw Sudoku - 300 Challenging Puzzles - Volume 2: Super Fiendish Irregular Sudoku Puzzle Book for Adults with Solutions - Paperback