num_pages: 175
description: The Hardys and their friends discover the key to a spy ring while exploring a local cave
language: English
title: The Secret of the Caves
titlecomplete: The Secret of the Caves (Hardy Boys, #7)
genres: Middle Grade, Audiobook, Crime, Young Adult, Childrens, Classics, Adventure, Fiction, Detective, Mystery
ratings_count: 5669
series: The Hardy Boys
publisher: Grosset & Dunlap