| Title | Titolo | Year | Series |
| Portrait of Caroline | 1958 | ||
| Officers' Woman | La donna dell’ufficiale | 1972 | |
| The Villa On the Palatine | 1975 | ||
| Marie, Voodoo Queen | 1981 | ||
| The Cape Cod Caper | 1982 | Penny Spring And Sir Toby Glendower | |
| Death of a Voodoo Doll | 1982 | Penny Spring And Sir Toby Glendower | |
| Death on the Dragon's Tongue | 1982 | Penny Spring And Sir Toby Glendower | |
| Exit Actors, Dying | 1982 | Penny Spring And Sir Toby Glendower | |
| Lament for a Lady Laird | 1982 | Penny Spring And Sir Toby Glendower | |
| Zadok's Treasure | 1982 | Penny Spring And Sir Toby Glendower | |
| Affairs of State | 1983 | ||
| Love Among the Allies | 1985 | ||
| Desperate Measures | 1986 | ||
| Sinister Purposes | 1988 | ||
| The Menehune Murders | 1989 | Penny Spring And Sir Toby Glendower | |
| Toby's Folly | 1990 | Penny Spring And Sir Toby Glendower | |
| The Catacomb Conspiracy | 1992 | Penny Spring And Sir Toby Glendower | |
| The Cape Cod Conundrum | 1994 | Penny Spring And Sir Toby Glendower | |
| Dirge for a Dorset Druid | 1995 | Penny Spring And Sir Toby Glendower | |
| The Midas Murders | 1997 | Penny Spring And Sir Toby Glendower |