Extreme Sudoku: A collection of 200 of the toughest Sudoku puzzles known to man. (With their solutions.)
| Country | USA |
| Brand | Casa Creación |
| Manufacturer | Casa Creación |
| Binding | Hardcover |
| ItemPartNumber | 114461 |
| Color | Burgundy/maroon |
| ReleaseDate | 2012-08-07 |
| UnitCount | 1 |
| EANs | 9781616385200 |