Richard Matheson's "Prey"

"Prey" by Richard Matheson is also included in American Fantasy Tradition, edited by Brian Thomsen.  

First appearing in 1969, and the source material for a famous film adaptation, "Prey" is a great horror story.  Matheson doesn't just write the scenes of violence and blood very convincingly- the scenes about human relationships, that demonstrate the horror we face in our everyday lives, trying to get along with the people we say we love and who say they love us, are equally convincing and chilling.

Classic.