Extreme Sudoku: A collection of 200 of the toughest Sudoku puzzles known to man. (With their solutions.)
| Country | USA |
| Brand | GALLIMARD |
| Manufacturer | French and European Publications Inc |
| Binding | Hardcover |
| UnitCount | 1 |
| EANs | 9782070108763 |
| ReleaseDate | 0000-00-00 |