Harris's novels include:
* The Easter Egg Hunt (1950)
* The Runaway (1952)
* The House on Chestnut Street (1954)
* A Matter of Life and Death (1956)
* The Strangers (1958)
* The Far Journey (1960)
* The Golden Anniversary (1962)
* The Family Circle (1964)
* The Enduring Flame (1966)
* The Beloved Son (1968)
* The Last Summer (1970)
* The Homecoming (1972)
* The Anniversary (1974)
* The Inheritance (1982)
Harris's screenplays include:
* The Glass Slipper (1955)
* The Secret Life of Walter Mitty (1959)
* A Majority of One (1961)
* The Cardinal (1963)
* The Sandpiper (1965)
* Hawaii (1966)
* Hotel (1967)
* The Poseidon Adventure (1972)
* The Day of the Dolphin (1973)
* Airport 1975 (1974)
* Logan's Run (1976)
* Orca (1977)
* The Swarm (1978)
* Meteor (1979)
* The Final Countdown (1980)
* Inchon (1981)
Harris also produced several television series, including:
* The Richard Boone Show (1963–1964)
* Run for Your Life (1965–1968)
* Medical Center (1969–1976)
* Quincy, M.E. (1976–1983)
* Hart to Hart (1983–1987)