* The Pastor (1951)
* One Step from Heaven (1953)
* A Walk in the Sun (1954)
* The Girl on the Via Flaminia (1956)
* The Dark Virgin (1962)
* Go, Lovely Rose (1964)
* Square of Angels (1966)
* Hotel Adlon (1969)
* The Heiress (1970)
* The Love Season (1972)
* The Seven Seas (1974)
* The Peacock's Tail (1977)
* The Rich and the Beautiful (1979)
* The Sins of the Fathers (1981)
* The Secret of the Sahara (1983)
* The Romance of the Orient Express (1985)
* The Grand Hotel (1987)
* The Royal Palace (1989)
* The Last Dance (1991)
* The Golden Gate (1993)
* The Fountain of Dreams (1995)
* The Song of the Siren (1997)
* The Dance of the Dolphins (1999)
* The Pearl of the Pacific (2001)
* The Jewel of India (2003)
* The Treasure of the Incas (2005)
* The Secret of the Nile (2007)
Non-fiction
* The World of John Addison (1988)
* My Life and Loves (1990)
* The Art of Fiction (1995)
* The Writer's Handbook (1997)
* The Life of a Novelist (2000)