Zanthar of the Many Worlds
ELSEWHERE!
Professor John Zanthar, brilliant electronics specialist, walked around the advanced, compact cyclotron he had designed... and vanished.
Some strange, subatomic energy vortex lifted him, twisted him, and seemed to translate him... into another world.
Zanthar found himself on the strange planet Letar, where all his knowledge of science availed him not at all against the alien foes and forces he had to battle. For he landed in the middle of an all-out, primitive war – and he had to choose sides immediately and fight back strenuously... for his own life and those of his new allies, with the only weapons his naked hands could muster.
Zanthar was a fighting man as well as a scientist. He knew no fear, and he knew he could win out over anything he could see and feel. But then he was followed from Earth by the sinister Fu Cong, and he began to learn what real war was...
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Robert Moore Williams
Robert Moore Williams (1907—1977), born in Farmington, Missouri, was an American writer, primarily of science fiction. Pseudonyms included John S Browning, H. H. Hermon, Russell Storm and E. K. Jarvis (a house name).
His first published story was Zero as a Limit, which appeared in Astounding Science Fiction in 1937, under the pseudonym of "Robert Moore". He was a prolific author throughout his career, with his last novel appearing in 1972. His "Jongor" series was originally published in Fantastic Adventures in the 1940s and 1950s, but only appeared in book form in 1970. By the 1960s he had published over 150 stories.
Zanthar
Zanthar consists of 4 total books. The current recommended reading order for the series is provided below.

