collins hardcover

The Satan Bug x 12

1961 Collins hardcover, true first with original title – cover designed by Pino Dell-Orco

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

1947 UK hardcover from Collins and US hardcover from Dodd Mead

1949 Bantam reissue – cover art by C.C. Beall

1959 Avon edition – cover art by Darcy

1960 UK paperback reissue – cover art by Sam Peffer

1962 Fontana reissue – cover art by John L. Baker

1965 Fontana UK reissue – cover art by Renato Fratini.

1937 Collins hardcover, author’s 3rd crime novel and 3rd with Lemmy Caution, tough US G-man

cover art by John Pisani

another source lists this as the 1953 Dodd Mead US edition