Mr. Hardy is injured in tracing some stolen gold. A hunt by the boys leads to an abandoned mine, and there things start to happen. A western story all boys will enjoy.
THE SHORE ROAD MYSTERY
Automobiles were disappearing most mysteriously from the Shore Road. It remained for the Hardy Boys to solve the mystery.
THE SECRET OF THE CAVES
When the boys reached the caves they came unexpectedly upon a queer old hermit.
THE MYSTERY OF CABIN ISLAND
A story of queer adventures on a rockbound island.
THE GREAT AIRPORT MYSTERY
The Hardy Boys solve the mystery of the disappearance of some valuable mail.
GROSSET & DUNLAP, Publishers, NEW YORK