Extreme Sudoku: A collection of 200 of the toughest Sudoku puzzles known to man. (With their solutions.)
| Country | USA |
| Brand | Martingale |
| Manufacturer | Martingale |
| Binding | Paperback |
| Size | 8.5" x 11" printed on your home computer |
| UnitCount | 1 |
| EANs | 9781564778871 |
| ReleaseDate | 0000-00-00 |