| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Sudoku: The Ultimate Blue Book - Easy To Medium, Puzzles & Solutions | 978-1-4414-0098-7 (1-4414-0098-2) | 2008 |
| Sudoku: The Ultimate Red Book - Medium To Hard, Puzzles & Solutions | 978-1-4414-0130-4 (1-4414-0130-X) | 2008 |
W.S. · Will Schutt · Will Scott · Will South · Willi Schoth · Willi Sitte · Willie Seth