The book "Submarine Warfare Today: How the Underwater Threat Was Met and Defeated, with Descriptions of the Inventions and Devices Used, Speed Boats, Mystery Vessels, Nets, Aircraft, and More, and Describes the Selection and Training of the Large Numbers of Personnel Used." Author: Domville-Fyfe , Charles William. The book provides an interesting overview of the development and use of submarines in the fight against the enemy, revealing the strategies and technologies used. The author describes in detail the innovations used to detect and destroy underwater objects, as well as the process of selection and training of the vast personnel involved in this dangerous struggle. The book will be a useful resource for those interested in the history of naval operations and the technology of modern warfare."