The C.I.D. Room Series
| The C.I.D. Room* (1967) | Circle of Danger (1968) | Murder among Thieves (1969) | Guilt without Proof (1970) |
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| Despite the Evidence (1971) | Call Back to Crime (1972) | Field of Fire (1973) | The Murder Line (1974) |
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| Six Days to Death (1975) | Murder Is Suspected (1977) | Ransom Town (1979) | A Man Condemned (1981) |
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| Betrayed by Death (1982) | One Man's Justice (1983) | ||
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* aka All Leads Negative (in the US)