Only Extreme Sudoku: 400 Extremely Challenging Puzzles
| Country | USA |
| Author | Poindexters Playful Puzzles |
| Binding | Paperback |
| EAN | 9781534930247 |
| ISBN | 1534930248 |
| Label | CreateSpace Independent Publishing Platform |
| Manufacturer | CreateSpace Independent Publishing Platform |
| NumberOfPages | 106 |
| PublicationDate | 2016-06-07 |
| Publisher | CreateSpace Independent Publishing Platform |
| Studio | CreateSpace Independent Publishing Platform |
| ReleaseDate | 0000-00-00 |