The Secret of the Caves (The Hardy Boys Mystery Stories Book 7)

New York: Grosset & Dunlap, 1929. Reprint. Hard Cover. Very Good/Very Good. 7x5x0. Carpentieri 1947A-26. Pages toned, jacket edges reinforced on reverse, owner bookplate on front flyleaf. 1929 Hard Cover. iv, 210 pp. 8vo. #7 in the Hardy Boys series. "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.