The book "The Submarine Book for Boys" by Collins A. Frederick and Collins Virgil D. is an exciting journey into the world of submarines! In this book, you will learn about the history of submarines, their role in naval conflicts, the design features and unique capabilities of these mysterious floating machines. You will be able to look into the mysterious world of underwater strategies and technologies and understand how submarines affect the military sphere. This book will not only expand your knowledge of the technique, but also take your passion for the sea and war to a new level!