- (1982) Novel (as John Tarrant): "China Gold" (aka "Operation Sovereign")
- (1978) Novel (as John Tarrant): "The Clauberg Trigger"
- (1977) Novel (ss John Tarrant): "The Rommel Plot"
- (1981) Novel (as Patrick Blake): "Double Griffin" (aka "The Skorzeny Project")
- (1979) Novel (as Patrick Blake): "Escape to Athena" (filmed as 'Escape to Athena (1979)')
- (1994) Novel: "A Double Deception"
- (1991) Novel: "Last Act"
- (1990) Novel: "In the Red"
- (1989) Novel: "Death of a Sahib"
- (1988) Novel: "Gone Missing (aka "Missing from the Record")
- (1987) Novel: "Picture of the Year"
- (1985) Novel: "A Different Drummer"
- (1984) Novel: "Troika"
- (1984) Novel: "A Conflict of Interests"
- (1983) Novel: "The Russian Enigma"
- (1982) Novel: "A Falcon for the Hawks"
- (1981) Novel: "The Winter Touch (US Title: "The Eisenhower Deception"; aka "The Presidential Affair")
- (1979) Novel: "Backfire"
- (1978) Novel: "The Mills Bomb" (aka "The Loner")
- (1976) Novel: "State Visit"
- (1975) Novel: "Skirmish"
- (1974) Novel: "The October Plot" (US Title: "The Bormann Brief"; aka "Dying Fall")
- (1973) Novel: "Seven Days to a Killing" (aka "The Black Windmill", "A Spy's Ransom"; filmed as The Black Windmill (1974)).
- (1971) Novel: "The Judas Mandate" (aka "The Last Refuge")
- (1971) Novel: "Last Post for a Partisan" (aka "The Sleeper")
- (1970) Novel: "A Piece of Resistance" (aka "Never Surrender")
- (1993) Novel (featuring Peter Ashton): "Hostile Intent")
- (1994) Novel (featuring Peter Ashton): "A Killing in Moscow")
- (1995) Novel (featuring Peter Ashton): "Death Throes")
- (1996) Novel (featuring Peter Ashton): "Warning Shot"
- (1996) Novel (featuring Peter Ashton): "A Lethal Involvement"
- (1997) Novel (featuring Peter Ashton): "Blood Money"
- (1999) Novel (featuring Peter Ashton): "Dead Reckoning" ("The Warmongers")
- (2000) Novel (featuring Peter Ashton): "The Honey Trap"
- (2001) Novel (featuring Peter Ashton): "One Man Running"
- (2003) Novel (featuring Peter Ashton): "Cry Havoc"
- (2004) Novel (featuring Peter Ashton): "Assassination Day:
- (2005) Novel (featuring Peter Ashton): "The Renegades"
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