Mike Shayne is a hard-boiled detective who appears in a variety of books, movies, radio plays, and stories by Brett Halliday and various ghost writers.
I'm really into the cover art for these books, and have been collecting them for a while. There used to be a great website about Mike Shayne at mikeshayne.com, but now it's only accessible through the internet archive.
I've got my own covers for many of the books, which are shown here. You can click through to flickr for high-res scans of the book covers. Books listed with title but no cover are books I don't have copies of.
The Private Practice of Michael Shayne (1940)
The Uncomplaining Corpses (1940)
Bodies are Where You Find Them (1941)

The Corpse Came Calling (1942)
Murder Wears a Mummer's Mask (1943; AKA In a Deadly Vein)
Blood on the Black Market (1943; Heads You Lose)
Michael Shayne's Long Chance (1944)
Murder and the Married Virgin (1944)
Murder is My Business (1945)
Marked for Murder (1945)
Blood on the Stars (1948)
Call for Michael Shayne (1949)
This is It, Michael Shayne (1950)
Framed in Blood (1951)
What Really Happened (1952)
She Woke to Darkness (1954)
The Blonde Cried Murder (1956)
Weep for a Blonde (1957)
Murder and the Wanton Bride (1958)
Target: Michael Shayne (1959)
Murder Takes No Holiday (1960)
Killers from the Keys (1961)
Murder by Proxy (1962)
Never Kill a Client (1962)
The Corpse that Never Was (1963)
The Body Came Back (1963)
A Redhead for Michael Shayne (1964)
Michael Shayne's 50th Case (1964)
The Violent World of Michael Shayne (1965)
Nice Fillies Finish Last (1965)
Lady, Be Bad (1969)
Count Backwards to Zero (1971)
I Come to Kill You (1971)
Kill All the Young Girls (1973)
Blue Murder (1973)
Million Dollar Handle (1976)
Win Some, Lose Some (1976)