"The Boys' Book of Submarines" by A. Frederick Collins and Virgil D. Collins is an informative publication written in the early 20th century. This book serves as a guide for young readers, exploring the mechanics, history, and design of submarines, particularly during World War I. Its main focus is on educating boys about submarines, including how they function and the intricate details of their construction, with practical components for building models included as well. At the start of the book, the authors introduce readers to the concept of submarines, emphasizing their significance during the ongoing world conflict. The text outlines the evolution of submarines, dating back to early inventions and notable figures such as Robert Fulton and David Bushnell. It highlights the role of submarines in modern naval warfare, explaining their capabilities and the advancements that led to their current designs. The opening serves as a captivating invitation for young enthusiasts to delve deeper into the fascinating world of underwater exploration and warfare. (This is an automatically generated summary.)