The Story of Espionage at One Hundred Fathoms

Espionage at One Hundred Fathoms is the second book in the S.O.S. Boys Mystery Book Series. In this thrilling adventure, Rick, Greg, and Topher discover a mysterious treasure off the shores of Puget Sound, which leads them into a web of espionage, nuclear submarines, and international intrigue. Alongside their trusty robot dog, Markie, and a cast of intriguing characters, the boys dive into a high-stakes mystery that takes them from San Juan Island to the rugged waters of Keto Island. Will they uncover the secrets behind the treasure before it's too late?