| Author | Charles Murray, Catherine Bly Cox |
| Publisher | Blackstone Audio, Inc. |
| Binding | Audible Audiobook |
| RRP | $27.26 |
| Publication date | 04/30/2019 |
| Author | Charles Murray, Catherine Bly Cox |
| Publisher | Touchstone Books |
| Binding | Paperback |
| RRP | $12.95 |
| Publication date | 05/01/1990 |
