Spillane thriller gives new meaning to getting in too deep.
This cover for Mickey Spillane's The Deep comes from the UK imprint Corgi Books, which gave Spillane's entire catalog similar minimalist—and uncredited—treatment. Spillane had a couple of gaps in his publishing career, and this book came in 1961 after a nine year break following his indoctrination into the Jehovah's Witnesses in 1952. It has a main character named Deep and he's on a revenge spree, so there's the title for you. Though the cover isn't attributed we suspect it was painted by Renato Fratini. It looks like his work, and he did a Spillane series for Corgi during the early 1960s.