The Rover Boys Under Canvas; Or, The Mystery of the Wrecked Submarine

A peaceful camping trip shatters when a top-secret submarine mysteriously runs aground near the boys' site. Thrust into a web of naval espionage, they must unravel the truth behind the submerged vessel. Shadowy figures and dangerous secrets threaten their safety as they dig deeper into the military enigma. The brothers race to expose a thrilling conspiracy before they become its next victims.