| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Pocket Sudoku - a compact & travel-friendly puzzle book: only 4 x 6 inches in size | 5 Difficulty Levels | easy - normal - hard - very hard - extreme | 150+ Grids With Answers At The Back | 978-1-6994-6354-3 (1-6994-6354-9) | 2019 |