“The River Motor Boat Boys on the Columbia; Or, The Confession of a Photograph” by Harry Gordon continues the thrilling adventures of the River Motor Boat Boys as they navigate the powerful Columbia River. In this installment, the discovery of a mysterious photograph sets the stage for another captivating mystery that readers won't be able to resist. Gordon's vivid descriptions and suspenseful storytelling make this book a must-read for fans of high-stakes river adventures.