He is the author of over 100 short stories of psychological horror and magic realism which are gathered in over 150 major anthologies and in his critically hailed hardcover short story collections Scars and Other Distinguishing Marks, Amazon #1 bestseller Dystopia, and Zoopraxis.
He also authored a magical realism novella set in Hollywood titled The Ritual of Illusion, and was the editor of the commemorative book Stephen King's Battleground.
He wrote or co-wrote the screenplays for Three O'Clock High, Full Eclipse, It Takes Two, Loose Cannons Shifter, Midvale The Nature of Evil (co-written with his father Richard Matheson), Paradise, It Waits, Happy Face Killer, Voices of Midway, "≤Red Sleep", "Hooky", Dean Koontz's Soul Survivor as a 4-hour mini series, three Masters of Horror episodes, Stephen King's Big Driver, and Nightmare Cinema.
He wrote for the magazines Amazing Stories and Tales From The Crypt among the others, and he is the author of the miniseries Nightmares & Dreamscapes and adapted as four-hour miniseries H. G. Wells' The Time Machine, Roger Zelazny's The Chronicles of Amber and Whitley Strieber's Majestic.
He is also the co-executive producer of the films Cub, It Waits, Paradise, Full Eclipse and Big Driver.