Richard Sharpe Shaver was an American writer and artist who achieved notoriety in the years following World War II as the author of controversial stories that were printed in science fiction magazines. In Shaver's story, he claimed that he had had personal experience of a sinister ancient civilization that harbored fantastic technology in caverns under the earth. The controversy stemmed from the claim by Shaver, and his editor and publisher Ray Palmer, that Shaver's writings, while presented in the guise of fiction, were fundamentally true. Shaver's stories were promoted by Ray Palmer as "The Shaver Mystery".

Amazing Stories is an American science fiction magazine launched in April 1926 by Hugo Gernsback's Experimenter Publishing. It was the first magazine devoted solely to science fiction. Science fiction stories had made regular appearances in other magazines, including some published by Gernsback, but Amazing helped define and launch a new genre of pulp fiction.