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by Franklin W. DixonHardcover details (United Kingdom). details (USA). details (Germany). details (Canada). ISBN: 978-0-00-160522-0 ISBN-10: 0-00-160522-4 |
| See also: | ||
| 2004 | Hardcover | The Sinister Signpost (Hardy Boys, Book 15) |
| 1989 | Paperback | Sinister Signpost (Hardy Boys Mystery Stories) |
| 1982 | Paperback | Sinister Signpost (Hardy Boys Mystery Stories) |
| 1975 | Paperback | The Sinister Signpost (Hardy boys mystery stories / Franklin W Dixon) |
| 1936 | Hardcover | The Sinister Signpost (Hardy Boys #15) |