Extreme Sudoku: A collection of 200 of the toughest Sudoku puzzles known to man. (With their solutions.)
| Country | USA |
| Brand | Springer |
| Manufacturer | Springer |
| Binding | Hardcover |
| ItemPartNumber | 9789811026775 |
| ReleaseDate | 2017-02-15 |
| UnitCount | 1 |
| EANs | 9789811026775 |