- 150 X-Sudoku R?tsel Diagonalsudoku Buch : Mittel, Sudoku Varianten, Standard 9x9 Block Mit X Factor, Book 1
- 150 X-Sudoku R?tsel Diagonalsudoku Buch : Schwer, Sudoku Varianten, Standard 9x9 Block Mit X Factor, Book 2
- 100 Sudoku Puzzles Travel Sudoku Book : Easy, Travel-Sized, Pocket (5x8), Book 1
- 100 Sudoku Puzzles Travel Sudoku Book: Very Easy, Travel-Sized, Pocket (5x8), Book 4
- 150 Sudoku X Puzzles Diagonal Sudoku Book: Hard, Sudoku Variations, Standard 9x9 Grid with X Factor, Book 5,