New York Post Train Your Brain Su Doku: Difficult: The Official Puzzle Collection to Improve Concentration and Engage Your Mind
| Country | USA |
| Brand | HarperCollins Children's Books |
| Manufacturer | HarperCollins |
| Binding | Mass Market Paperback |
| ReleaseDate | 1995-04-20 |
| UnitCount | 1 |
| UPCs | 000064471136 |
| EANs | 0000064471136 |