| Title | Publisher | Date | Issue Points - Notes |
| The Body in the Bed | Harper | 1948 | UK: 1960 World |
| The Body Beautiful | Ditto | 1949 | UK: 1960 World |
| Portrait in Smoke | Harper | 1950 | UK: 1951 Reinhardt |
| The Darkening Door | Ditto | 1952 | |
| Rafferty | Harper | 1953 | UK: 1953 Reinhardt |
| The Black, Black Hearse | St Martin's | 1955 | as Frederic Freyer. UK: 56 Hale |
| The Tooth and the Nail | Harper | 1955 | UK: 1955 Evans |
| The Longest Second. | Ditto | 1957 | UK: 1958 Evans |
| The Wife of the Red-Haired Man | Harper | 1957 | UK: 1957 Evans |
| Beacon in the Night | Ditto | 1958 | UK: 1960 Boardman |
| Formula for Murder | NAL | 1958 | |
| The Doom-Maker | Dutton | 1959 | B.X. Sanborn. UK: 1959 Boardman as The Blonde on Borrowed Time |
| The Fourth of Forever | Harper | 1963 | UK: 1963 Boardman |
| The Chinese Mask | NAL | 1965 | |
| Not I, Said the Vixen | Fawcett | 1965 | |
| The Spy in Bangkok | NAL | 1965 | |
| The Spy in the Jungle | NAL | 1965 | |
| The Heir Hunters | Harper | 1966 | UK: 1967 TV Boardman |
| The Spy at Angkor Wa | NAL | 1966 | |
| The Spy in the Java Sea | NAL | 1966 | |
| The Source of Fear | NAL | 1968 | UK: 1971 Hale |
| The 49 Days of Death | Sherbourne | 1969 | |
| Heist Me Higher | NAL | 1969 | UK: 1971 Robert Hale |
| The Lopsided Man | Pyramid | 1969 | |
| The Corsican | Dodd Mead | 1971 | UK: 1976 Robert Hale |
| The Law | Warner | 1975 |

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Further Information |