He was born and lived in Washington, D. C. In 1910, he graduated from the law school of the National University and admitted to the District of Columbia Bar. He served in World War I; after his Army service, he became editor of a group of trade papers in New York, where he taught medical jurisprudence.
His first published work was “The Law of the Movies,” in The Motion Picture Magazine (December 1917). “Demons of the Night” was published in Detective Story Magazine on March 19, 1918, followed by "Was She Mad?" on March 25, 1918. He introduced Jules de Grandin as a character in 1925, and continued writing stories about him until 1951. The longest of the de Grandin stories is the 1932 story The Devil's Bride, strongly influenced by Robert W. Chambers' 1920 novel The Slayer of Souls.
Quinn also wrote as Hans Lugar, Rob Norman, Luke Paradise, Snip Taylor, and Leonard White.
Quinn's first book, Roads, was published in 1938, and then reissuied in a revised edition by Arkham House in 1948.
Ten of the Jules de Grandin stories were collected in The Phantom Fighter (Mycroft & Moran, 1966). The Horror Chambers of Jules de Grandin appeared in paperback from Popular Library in 1977, edited by Robert Weinberg.
Quinn's posthumously published novel Alien Flesh (1977) is a sexually explicit erotic fantasy about a male Egyptologist who has a magical sex-change into a beautiful young woman. It was illustrated by SF artist Stephen Fabian.
The latest collection of his stories is Demons of the Night, edited by Gene Christie.