Aka William Callahan, Arthur Allport. Raymond Zinke Gallun (March 22, 1911 - April 2, 1994) was an early science fiction writer. Gallun (rhymes with "balloon") was born in Beaver Dam, Wisconsin. He lived a drifter's existence, working a multitude of jobs around the world in the years leading up to World War II. He sold many popular stories to pulp magazines in the 1930s. "Old Faithful" (1934) was his first noted story. "The Gentle Brain" was published in "Science Fiction Quarterly" under the pseudonym Arthur Allport. Another of his pseudonyms was William Callahan.

Howard Phillips Lovecraft, of Providence, Rhode Island, was an American author of horror, fantasy and science fiction. Lovecraft's major inspiration and invention was cosmic horror: life is incomprehensible to human minds and the universe is fundamentally alien. Those who genuinely reason, like his protagonists, gamble with sanity. Lovecraft has developed a cult following for his Cthulhu Mythos, a series of loosely interconnected fictions featuring a pantheon of human-nullifying entities, as well as the Necronomicon, a fictional grimoire of magical rites and forbidden lore. His works were deeply pessimistic and cynical, challenging the values of the Enlightenment, Romanticism and Christianity. Lovecraft's protagonists usually achieve the mirror-opposite of traditional gnosis and mysticism by momentarily glimpsing the horror of ultimate reality. Although Lovecraft's readership was limited during his life, his reputation has grown over the decades. He is now commonly regarded as one of the most influential horror writers of the 20th Century, exerting widespread and indirect influence, and frequently compared to Edgar Allan Poe. — Wikipedia

Aka Lyda Belknap Long. Frank Belknap Long was a prolific American writer of horror fiction, fantasy, science fiction, poetry, gothic romance, comic books, and non-fiction. Though his writing career spanned seven decades, he is best known for his horror and science fiction short stories, including early contributions to the Cthulhu Mythos. During his life, Long received the World Fantasy Award for Life Achievement (at the 1978 World Fantasy Convention), the Bram Stoker Award for Lifetime Achievement (in 1987, from the Horror Writers Association), and the First Fandom Hall of Fame Award (1977).

A prolific author in various genres under his own name, John Francis Russell Fearn also used these pseudonyms: Astron del Martia, Brian Shaw, Conrad G. Holt, Dennis Clive, Frank Jones, Geoffrey Armstrong, Griff, Hugo Blayn, John Russell, K. Thomas Mark Denholm, Paul Lorraine, Polton Cross, Spike Gordon, Thornton Ayre, Vargo Statten, Volsted Gridban, Dom Passante, John Cotton, Ephriam Winiki, Lawrence F. Rose, Earl Titan, Ephraim Winiki. John Russell Fearn was an extremely prolific and popular British writer, who began in the American pulps, then almost single-handedly drove the post-World War II boom in British publishing with a flood of science fiction, detective stories, westerns, and adventure fiction. He was so popular that one of his pseudonyms became the editor of Vargo Staten’s Science Fiction Magazine in the 1950’s! His work is noted for its vigor and wild imagination. He has always had a substantial cult following and has been popular in translation around the world.