- Number Fill-Ins, Volume 2: 100 Fun Crossword-style Fill-In Puzzles With Numbers Instead of Words (Number Puzzle Fun)
- Number Fill-Ins, Volume 3: 100 Fun Crossword-style Fill-In Puzzles With Numbers Instead of Words (Number Puzzle Fun)
- Number Fill-Ins, Volume 1: 100 Fun Crossword-style Fill-In Puzzles With Numbers Instead of Words (Number Puzzle Fun)
- Samurai Sudoku Multi-Level Puzzles - Volume 1: 100 Samurai Sudoku Puzzles - 33 Easy, 34 Medium, and 33 Hard Puzzles - For the Samurai Sudoku Lover Who Likes A Choice
- Samurai Sudoku Hard Puzzles - Volume 2: 100 Hard Samurai Sudoku Puzzles for the Experienced Solver