This is a must-buy for the Royal Navy and Submarine enthusiast, being a complete directory of RN submarines from the outset to the present day. There is a wealth of detail on each class. Every entry contains the specification, launch dates of individual boats, details of evolving construction and armament and other salient information in a compact form. The high quality of the drawings of the majority of classes adds to the value of this work which includes the very latest Astute submarines currently coming into service. This book is a complete directory of submarines and will be widely welcomed by all with an interest, professional or lay, in the subject.