Hardy Boys 07: The Secret of the Caves
, by Dixon, Franklin W.Note: Supplemental materials are not guaranteed with Rental or Used book purchases.
- ISBN: 9780448089072 | 0448089076
- Cover: Hardcover
- Copyright: 5/1/1929
When Frank and Joe try to help their father locate Miss Todd's missing brother, they find themselves tangled up with a mysterious hermit named Captain Royal.