They were the scum of the armed services, reluctant volunteers for a nerve-tingling suicide mission. Their leader was Brendan Deasy Jackorowski - Mister Jack - gunnery sergeant, general troublemaker, and the toughest non-com in the service. He scoured the scoured the military prisons for a team of dirty tricks experts - safecracker, murderer, smuggler, arsonist - to be part of the savage fighting unit needed to rescue a vital agent imprisoned inside Nazi-occupied France. Some of them would make it back - some wouldn't. But all chose bloody action and possible death to twenty years behind bars - or a noose.
Jay Flynn was an American author who also wrote under the name J.M. Flynn.
Jay Flynn was born John M. Flynn on March 31, 1928, in Massachusetts. A Boston Irishman, he worked variously as a newspaperman, a bartender, editor, sex novelist, bootlegger, security guard, caretaker and, he claimed, "writer-in-residence" at a Nevada whorehouse.
His first published work was his only short story, "The Badger Game," followed by the novel, The Deadly Boodle as J. M. Flynn, part of an Ace Double in 1958. In 1975, Flynn went to work for the low-tier publisher, Belmont-Tower, where he lasted two years—fired because of his drinking—then moved to Richmond, Virginia, where he lived for a while on skid row. Eventually relocating to Connecticut, he checked into a V.A. hospital in Branford for a checkup, where he died of cancer at age 57 on February 6, 1986.
He also contributed at least one book to the Western author collective of Jack Slade.
I found it to be a really good story, only downside is I can't find any information about the other books in the series. This is supposed to be the 1st in a savage World War II action series.