num_pages: 228
description: 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.
language: English
title: The Secret of the Caves
titlecomplete: The Secret of the Caves (Hardy Boys, #7)
genres: Middle Grade, Audiobook, Detective, Childrens, Crime, Young Adult, Classics, Mystery, Adventure, Fiction
ratings_count: 5670
series: The Hardy Boys
publisher: Applewood Books