- Samurai Sudoku Puzzle Book for Adults - Medium: 500 Normal Sudoku Puzzles Overlapping into 100 Samurai Style
- Large Print Medium Killer Sudoku: 100 Sumoku Puzzles - Sudoku Variety Puzzle Book
- Samurai Sudoku Puzzle Book for Adults - Hard: 500 Difficult Sudoku Puzzles Overlapping into 100 Samurai Style
- Large Print Sudoku 16x16 - 100 Hard Puzzles: Very Difficult Hexadoku with Solutions - Sudoku Variant Puzzle Book for Adults
- Hard Killer Sudoku - 100 Challenging Puzzles: Sums Sudoku Puzzle Book for Adults - Very Difficult Sudoku Variant for Experts - Perfect Travel Companion





























