Book excerpt: 'Silent Killers is a triumph that is educational as well as highly entertaining.' - Clive Cussler James P. Delgado, President and CEO of the Institute of Nautical Archaeology, presents a detailed and visually stunning examination of the history and development of the modern nuclear submarine. Calling on his training as a nautical archaeologist who was among the first explorers to dive the Titanic, Delgado recreates the story of the submarine from the bottom up – that is through eerie photographs of subs at the bottom of the sea. In addition, he explores submarine technology, from wooden to iron to steel hulls, from hand-cranked to nuclear-powered propulsion, from candlelight to electricity, from gunpowder 'torpedoes' to nuclear missiles. An esteemed underwater archaeologist and marine historian, Jim Delgado has compiled an extraordinary history of the dragons of the deep.