Mensa® Kakuro

Nonogram Puzzle Book: Easy To Hard, From 20x20 to 50x50 Grids , Griddles, Hanjie – 80 Puzzles

Sudoku Puzzle Book for Adults: 1000 Medium Level Puzzles with Solutions - Vol 3

CrossMath – 200 Math Crossword Puzzles for Adults: Mixing Addition, Subtraction, Multiplication & Division

600 Kakuro Puzzles: Easy, Medium and Hard Unique Cross Sum Puzzles with Solutions.

100 Hard Extreme Dot To Dot Puzzles Book: Exciting And Mindful Dot-To-Dot For Adults- More Than 90 With Christmas, Sports, People, Vehicles, Flowers, ... And Relaxation (Extreme Dot To Dot Books)

1000+ Sudoku Puzzles for Adults: From Medium to Hard with Full Solutions

Sudoku Sudoku 200 Easy Puzzles: Large Print, For Adults, Teens, and Seniors

Brain Teasers for Smart Engineers: Tricky Brain Twisters, Mind Games and Fun Problem Solving for Engineers (Perfect Gifts for Engineers)

Positive Affirmations Sudoku: Sudoku with a Smile Large Print Very Easy to Easy Puzzles with Calm Affirmations