Nictzin Wilstone Dyalhis (1873–1942) was an American chemist and short story writer who specialized in the genres of science fiction and fantasy. He wrote as Nictzin Dyalhis. During his lifetime he attained a measure of celebrity as a writer for the pulp fiction magazine Weird Tales.
Nictzin Dyalhis's earliest stories, including "When the Green Star Waned" and its sequel "The Oath of Hul Jok," are fairly firmly in the science fiction genre; the former is sometimes credited for introducing the term "blaster" for a ray gun. Yet his overall output is most easily and readily categorized as occult fantasy, involving spiritual travel on the astral plane, journeys to Hell, and reincarnation.
Nictzin Dyalhis hasn't written any novels. He has only written short stories. His stories are:
Nictzin Dyalhis. Wikipedia.