Lie Down, Killer x 6

1952 Lion paperback original

1956 Crest edition – cover art by James Meese

better image than previously posted

1957 Crest reprint

1958 Crest – cover art by Darcy (Ernest Chiriacka)

1961 Gold Medal reissue – cover art by Barye Phillips

better image than previously posted

undated Fawcett Gold Medal reissue – cover art by Robert McGinnis

The Wanton x 5

1959 Horowitz release in Australia

cover art by Barye Phillips – better image than previously posted

1959 Signet paperback original in the US

International Edition Series #10 December 1961, March 1965

cover design by Grant Roberts

1966 Signet reissue – cover art by Robert McGinnis

1968 New English Library/Four Square Books release in the UK