U-Boat Hunter is the fifteenth book in My Story to feature a male protagonist. The book was written by Bryan Perrett, his fifth and last for the series. It was first published in September 2005 and reissued in January 2014. The book was the last My Story book with a male lead, until 2008's Roman Invasion.
"Spring 1942 "U-boat submerging, sir," said the lookout. As the conning tower disappeared beneath the waves the Asdic began to pick up echoes from the submarine. We altered course to conform with the enemy, whose track was clearly marked by a continuous slick of oil, like the trail of blood left by a wounded animal. "Stand by, depth charges!" ordered the Captain. As we reached the end of the slick he pressed the release buzzer. The depth charges went rolling over the stern and the usual eruptions of water were thrown up as they exploded far below. "U-boat surfacing, sir!" shouted the lookout. As the sinister grey shape broke the surface our 4-inch swung towards it. The bridge machine gun opened fire."