1961 Collins hardcover, true first with original title – cover designed by Pino Dell-Orco
1962 Collins hardcover, 2nd printing
1962 Scribners hardcover in the US
1963 Popular Library reissue, a paperback original in the US
the back of the book gave away the author’s true name
1968 Fontana reissue – cover art by Renato Fratini
1970 Fawcett reissue – cover art by Bill Johnson
SMB Noir 