| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Sudoku, Juegos de numeros libro 7 Nivel dificil/ Suduko, Number Game Book 7, Advanced Level | 978-970-775-266-5 (970-775-266-1) | 2007 |
| Sudoku, Juegos de numeros libro 9 Nivel dificil/ Sudoku, Number Games Book 9, Advanced Level | 978-970-775-335-8 (970-775-335-8) | 2007 |
| Sudoku, Juegos de numeros libro 10 Nivel dificil/ Sudoku, Number Games Book 10, Advanced Level | 978-970-775-336-5 (970-775-336-6) | 2007 |