
cover art by Rudolph Zirm

1963 Horwitz paperback original

1964 Horwitz International Edition paperback

cover art by Robert McGinnis


1960 paperback original by Horowitz in Australia and Signet in the US

cover art by Barye Phillips

given date is 1959 Dutch edition

1967 Signet reissue – cover art by Robert McGinnis

McGinnis sketch for Signet reissue cover

cover art by McGinnis for 1972 Signet reissue


1961 Signet paperback original
cover art by Barye Phillips


1962 Horwitz International Edition

1968 Signet reissue – cover art by Ron Lesser

1967 Horwitz paperback original

1967 Signet – cover art by Robert McGinnis

1968 German edition – cover art by Robert McGinnis

1968 New English Library UK reissue



1960 Fawcett paperback original
better image than previously posted

1960 Priory reissue from the UK – cover art b y Charles Binger
better image than previously posted


pseudonym of Albert Leffingwell, who also wrote as Giles Jackson and Jim Steele
1939 Dial hardcover, this the later 1949 Popular Library paperback reissue
cover art by Rudolph Belarski

cover art by James Meese??
