"The Radio Boys Under the Sea" by J.W. Duffield is an exciting adventure novel that follows the exploits of the Radio Boys, Bob Layton, Herb Fennington, and Joe Atwood, as they embark on a thrilling quest to hunt for sunken treasure beneath the ocean's depths. The story begins with the Radio Boys receiving an invitation from an old friend, Captain Spark, who has discovered a lead to a lost treasure ship named the "Golden Galleon." This legendary ship is said to be filled with priceless riches and has been lying at the bottom of the ocean for centuries. Eager for adventure, Bob, Herb, and Joe join Captain Spark's crew on a specially equipped submarine to explore the depths of the sea. As they descend into the ocean, the Radio Boys encounter various challenges, including perilous underwater currents, encounters with marine life, and the ever-present danger of rival treasure hunters. Their trusty radio equipment proves to be invaluable for communication and navigation in the deep-sea environment. Throughout their underwater journey, the Radio Boys demonstrate their bravery, resourcefulness, and problem-solving skills as they search for clues to the treasure's location. Along the way, they uncover the mysteries of the deep and forge strong bonds with their fellow adventurers. "The Radio Boys Under the Sea" is a thrilling tale of underwater exploration, treasure hunting, and camaraderie. It combines elements of adventure, mystery, and the wonders of the deep sea. Readers are taken on an exhilarating ride as they follow the Radio Boys on their quest to uncover the secrets of the "Golden Galleon." The novel not only showcases the excitement of treasure hunting but also highlights the importance of teamwork and the enduring spirit of exploration. It emphasizes the idea that with determination and ingenuity, even the most challenging quests can be undertaken and accomplished. Overall, "The Radio Boys Under the Sea" is an engaging and action-packed addition to the Radio Boys series. It captures the imagination of readers with its underwater adventures, intricate plot, and the thrill of discovery that awaits beneath the waves.

Series fiction about wireless and radio was a popular genre of young adult literature at the turn of the 20th century and an early form of social media. Before television and the Internet, books about plucky youths braving danger and adventure with the help of wireless communication brought young people together. They gathered in basements to build crystal sets. They built transmitters and talked to each other across neighborhoods, cities and states. By 1920, there was music on the air and boys and girls tuned in on homemade radios, often inspired by their favorite stories. This book analyzes more than 50 volumes of wireless and radio themed fiction, offering a unique perspective on the world presented to young readers of the day. The values, attitudes, culture and technology of a century ago are discussed, many of them still debated today, including immigration, gun violence and guns on campus, race, bullying and economic inequality.

In order that the boy interested in radio telephony may construct his own receiving set, the Author herein will describe the construction of a small, cheap set which almost any lad handy at mechanics can build. Such a set should be sufficiently powerful to permit of successfully picking up the concerts and other programme entertainments being broadcasted frequently by stations throughout the country.