A Time writer handles with great skill, restraint, and understanding the problems of defending our shores from submarine attack, while preparing retaliatory submarine efforts of our own should war with Russia break out. His explanation of how our present anti-submarine forces work in the Atlantic is excellent. His exposition of the atomic submarines and the Polaris missile is also well-handled. A brief history of submarine warfare adds valuable historical perspective. But above all, the author's understanding of the men involved in this tremendous naval task---Admiral James Thach, Dr. Peter King, Admiral Hyman Rickover, etc.---gives the reader a deep sense of how vital a problem sea defense is today. An evaluation of Russia's huge submarine fleet, our chances of defeating it, and how a future submarine war would be waged make a dramatic concluding section to the book. Really a first rate job which deserves the attention of a wide readership!