"U-505" is a gripping non-fiction book written by Rear Admiral Daniel Vincent Gallery, detailing the extraordinary and highly classified capture of the German submarine U-505 on June 4, 1944. Daniel V. Gallery, then a U.S. Navy Captain, commanded Task Group 22.3—a hunter-killer force centered around the escort carrier USS Guadalcanal. The task group cornered, boarded, and successfully captured the German Type IXC submarine U-505 off the coast of West Africa. This marked the first time the U.S. Navy had captured an enemy warship on the high seas since the War of 1812. The operation yielded invaluable intelligence, including acoustic torpedoes, Enigma cipher machines, and German naval codebooks, allowing Allied forces to read U-boat radio messages in real-time.