Sudoku 1,000 Puzzles, 500 Hard and 500 Extra Hard: Keep Your Brain Active For Hours With This Sudoku Puzzle Book (Active Brain Series 2)
| Country | USA |
| Brand | Springer |
| Manufacturer | Springer |
| Binding | Hardcover |
| ItemPartNumber | 32299515 |
| ReleaseDate | 2011-05-18 |
| UnitCount | 1 |
| EANs | 9781441983329 |