Hypnojewels, Smugglers, and Ancient Alien Races: Rich Horton on The Plot Against Earth/Recruit for Andromeda
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“Calvin M. Knox” is one of Robert Silverberg’s most well-known pseudonyms. He used it extensively to write reviews, over two dozen short stories (frequently in magazines where he also had a story under his own name), and three novels: Lest We Forget Thee, Earth (1958), The Plot Against Earth (1959), and One of Our Asteroids is Missing (1964), all Ace Doubles.
Milton Lesser was born in Brooklyn in 1928, and changed his name to Stephen Marlowe in 1956. Under that name he wrote 40 crime novels and fictional autobiographies. He began publishing SF under his original name while still a teenager, and he continued to to do so through the 50s and 60s, producing seven novels and nearly 100 short stories between 1950 and 1965.
Silverberg and Lesser were published back-to-back in Ace Double D-358 in 1959, with the novels The Plot Against Earth and Recruit for Andromeda. The latter has never been reprinted, and has now been out of print for over 55 years.











