Possessed. No man was safe from the evil creature that inhabited her mind.
Somehow it had entered her mind. Somehow it transformed her from an innocent eleven-year-old girl into a young, voluptuous woman. helpless and confused, she went from one man to the next, charming t hem, seducing them, and - without knowing how or why - killing them. Only later did she realize that the thing inside her mind was forcing her on a search for another like herself, a fellow-victim possessed by evil, a soulmate, a horrifying realistic tale of terror and suspense.
US author of thrillers and some sf, who began publishing the latter with "First Man in a Satellite" for Super-Science Fiction in December 1958; sixteen further short sf/fantasy stories followed, chiefly for The Magazine of Fantasy and Science Fiction. His first sf novel Pig World (1971) depicts a Near-Future USA governed by a right-wing tyranny challenged by a vicious would-be demagogue. Soulmate (April 1970 F&SF; exp 1974) is a novel of possession (see Horror in SF), the victim being a young prostitute. I, Weapon (1974) features much violence and Sex involving Aliens. Runyon's sf tends to be action-filled, without extensive displacement or speculative content. Runyon was one of several sf authors who ghosted paperback-original thrillers under the Ellery Queen byline.
A decent little '70s chiller that treats its potentially icky premise with a surprising amount of taste and restraint. Ends up feeling more like an early (incredibly '70s) version of Under the Skin.