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by E. Phillips OppenheimPaperback details (United States). details (UK). details (Germany). details (Canada). ISBN: 978-1-4218-4122-9 ISBN-10: 1-4218-4122-3 |
| See also: | ||
| 2016 | Paperback | Peter Ruff and the Double Four |
| 2009 | Paperback | Peter Ruff And The Double Four |
| 2007 | Hardcover | Peter Ruff and the Double Four |