The book describes the long and difficult challenges encountered in developing effective weapon systems for the British submarine force, and discusses the difficulties and shortcomings in the UK's defense procurement system, a situation which still exists today. Ultimately, however, Western technological superiority and crew proficiency enabled the submarines of the Royal and United States Navies to match those of the Soviet Union, and he describes vividly the suspense and tension of underwater confrontations which might so easily have escalated to another dimension of warfare. The book also sets out hitherto undisclosed details of submarine activities during the 1962 Cuban Missile Crisis, when the world confronted the real possibility of a massive nuclear exchange. But it is not all serious content, and Conley offers a glimpse for the reader of many humorous situations and events, of animals that found themselves under the sea in a submarine, in one case during a war patrol, and other moments of levity that broke the tension of serving in a highly complex and sophisticated fighting machine. The Cold War era is now long past. However, it is evident that as the West now confronts an aggressive, recidivist Russia and a more aggressive China, Britain's submarine force once again will be key to the security of all its citizens. This fine memoir captures vividly the key events and history of the Cold War, and in doing so will open the reader's eyes to the significance and importance today of the Royal Navy Submarine Service.