The Rover Boys on the Great Lakes; Or, The Secret of the Island Cave

A vast expanse of inland water holds the key to a startling mystery hidden within a secluded, watery cavern. Exploring the rocky coastlines uncovers a sophisticated smuggling ring operating under the cover of dense maritime fog. Kidnapping and sabotage force three brothers into a desperate nautical chase to rescue a captive and expose the criminal syndicate. Battling treacherous currents and armed...