This delightful little book is one of the publisher's New Vanguard series... It manages to pack into a mere 48 pages an incredible amount of detail and infromation written in an easy style that does not descend to over-simplification... All in all, this is quite a remarkable book, both as a good historical summary of an often-overlooked aspect of the war and also as an important technical reference.

Michael Young, The Northern Mariner / Le Marin Du Nord

This book covers the various classes of submarine used by the Royal Navy as well as a considerable amount of detail in their usage during WWI. We are blessed with a superb variety of period photographs of these ships and this is further enhanced by the excellent illustrations and cutaways of artist Tony Bryan.

Scott Van Aken, Modelingmadness.com (June 2008)

As the major engaged in an arms race in the early years of the 20th century, the Admiralty was tasked with developing the sbumarine. Covering all classes of submarine developed and deployed during the war, this book includes extensive technical detail and fascinating accounts of daring submarine raids in the Baltic and the Dardanelles.

Game Trade Magazine (April 2008)