This audiobook is narrated by a digital voice.

A mysterious disappearance, a cryptic message, and a trail that leads to a hidden cave on the rugged coast—The Secret of the Caves is a thrilling installment in the beloved Hardy Boys series that will keep listeners on the edge of their seats.

When Frank and Joe Hardy set out to help their friend Chet Morton find a missing professor, they stumble upon far more than they expected. Strange signals, secret passageways, and suspicious characters point to something much bigger—and much more dangerous—than a simple disappearance.

With their trademark determination and sharp instincts, the Hardy Boys follow the clues to a series of eerie caves along the shoreline, where danger lurks in the shadows and nothing is as it seems. What they uncover could threaten national security, and it's up to them to crack the case before time runs out.

Perfect for young listeners and nostalgic fans of classic detective adventures, The Secret of the Caves delivers fast-paced action, clever twists, and the enduring excitement of the Hardy Boys' quest for truth and justice.