Reccomendation: "The terrible hours" by Peter Maas. It's a REALLY good account of the story of the submarine U.S.S. Squalus, which sank off Portsmouth N.H. in 1939. They were able to rescue a significant portion of the crew. It basically tells the story of Cmdr. Charles "Swede" Momson, and how the U.S. Navy was able to get the first "deep rescue" device in position. It's excellent, and brings a true American hero to public attention.