"Duel" (1971), a short story, which he later adapted into a screenplay for Duel (1971), Steven Spielberg's first feature-length film.
Context: You never know, he thought. You just never know. You drift along, year after year, presuming certain values to be fixed; like being able to drive on a public thoroughfare without somebody trying to murder you. You came to depend on that sort of thing. Then something occurs and all bets are off. One shocking incident and all the years of logic and acceptance are displaced and, suddenly, the jungle is in front of you again. Man, part animal, part angel. Where had he come across that phrase? He shivered.
It was entirely an animal in that truck out there.
Quotes from book
Duel
Remember that murderous semi chasing Dennis Weaver down a lonely stretch of desert highway? Duel, Steven Spielberg's acclaimed first film, was adapted by Richard Matheson from his unforgettable story of the same name. But "Duel" is only one of the classic suspense tales in this outstanding collection of stories by the Grand Master of Horror, which also contains Matheson's legendary first story, "Born of Man and Woman," as well as several stunning shockers that inspired memorable episodes of The Twilight Zone, including "Little Girl Lost," "Steel," and "Third from the Sun." Like Matheson's previous collection, Nightmare at 20,000 Feet, this collection is an indispensable treasure trove of terror from the New York Times bestselling author of I Am Legend and What Dreams May Come. At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.