Extreme Sudoku: A collection of 200 of the toughest Sudoku puzzles known to man. (With their solutions.)
| Country | USA |
| Manufacturer | CreateSpace Independent Publishing Platform |
| Binding | Paperback |
| IsAdultProduct | 1 |
| EANs | 9781532846045 |
| ReleaseDate | 0000-00-00 |