Edwyn Gray is a British author who specialises in naval writing. Educated at the Royal Grammar School, High Wycombe, Gray read economics at the University of London and then joined the British civil service. His writing career began in 1953 when he started writing for magazines. His first book was published in 1969, and he became a full-time writer in 1980.
An interesting little series of stories involving a German U-Boat commander near and at the end of World War Two. I wouldn't really call it a novel as much as I would a series of four separate stories involving generally the same character weakly woven together in an overarching narrative of the war.
And, of course, it grossly glosses over the dark side of Nazi Germany.
In the end, the main character *spoilers* is directly responsible for the death of Hitler (well, the real Hiter - read the book), but in a very anti-climactic and kind of silly way - condemning dozens of other, arguably "innocent" people to death in the process. "Collateral damage" I guess.