Novels[]
- 1977 – Communion
- 1984 – The Foundling
- 1998 – Dark City
- 1999 – End of Days
- 1999 – Pitch Black
Dr. Owen Orient[]
- 1970 – Doctor Orient
- 1972 – Raga Six
- 1973 – Lady Sativa
- 1974 – Baron Orgaz
- 1978 – The Priestess
- 1979 – The Seth Papers
- 1991 – Blue Limbo