- Sumdoku Puzzles: 300 Sum-Doku (Also Know As Killer Sudoku) Puzzles. 100 Easy, 100 Medium And 100 Hard. Solutions At The Back Of The Book.
- Sumdoku Puzzles For Adults: 330 Easy To Hard Sumdoku (Killer Sudoku) Puzzles. 110 Easy, 110 Medium And 110 Hard Puzzles. This book will give you a good challenge.
- Difficult Sudoku: Hard To Extremely Hard Difficulty Level Sudoku Puzzle Book. Total 300 Puzzles. 100 Hard, 100 Very Hard And 100 Extreme
- All Easy Sudoku Book For Beginners 2: This is Second Book in Our All Easy Sudoku Books Series. 250 Simple And Fun Sudoku Puzzles Suitable For Beginner Or Anyone Who Likes A Bit Easier Sudoku Puzzles.
- Sudoku Variations: Overlapping Sudoku Variants and Large 12 X 12 and 16 X 16 Sudokus. One Puzzle Per Page. 180 Puzzles.





























