Famous Fantastic Mysteries was an American pulp magazine published from 1939 to 1953. The editor was Mary Gnaedinger. It was launched by the Munsey Company as a way to reprint the many science fiction
The cover of the first issue, dated September/October 1939
Cover of the August 1942 issue, by Virgil Finlay
Murray Leinster was a pen name of William Fitzgerald Jenkins, an American writer of genre fiction, particularly of science fiction. He wrote and published more than 1,500 short stories and articles.
Leinster c. 1953
Leinster's "Juju" was the cover story of The Thrill Book in October 1919.
Leinster's "The Fifth-Dimensional Catapult" was the cover story in the January 1931 Astounding Stories.
Leinster's "Planet of Sand" was cover-featured on the February 1948 issue of Famous Fantastic Mysteries.