SPRUILL, Steven. American, b. 1946. Genres: Mystery/Crime/Suspense, Novels. Career: Full-time writer since 1981. Biological technician, Hazleton Labs., Falls Church, Virginia, 1969-73; psychology intern, Veterans Administration Hospital, Washington, D.C., 1978-79, and Mt. Vernon Community Health Center, Alexandria, Virginia, 1979-80. Publications: MEDICAL THRILLERS: Keepers of the Gate, 1977; The Psychopath Plague, 1978; Hellstone, 1980; The Imperator Plot, 1983; The Genesis Shield, 1985; Paradox Planet, 1988; Painkiller: A Novel of Medical Terror, 1990; Rulers of Darkness, 1995. OTHER NOVELS: Before I Wake, 1992; My Soul to Take, 1994.