- Novel: Cold Tactics, 2001
- Novel: Rules of the Game, 2001
- Novel: Special Forces, 2002
- Novel: The Networks, 2002
- Novel: Due Process, 2003
- Novel: Hostage, 2004
- Novel: The Assets, 2000
- Novel: Never Look Back, 2000
- Novel: The Reckoning, 1999
- Novel: Berlin Exchange, 2000
- Novel: Shadow of a Doubt, 1998
- Novel: The Long Run, 1996
- Novel: Aid and Comfort, 1997
- Novel: Beyond the Silence, 1995
- Novel: As Time Goes by, 1994
- Novel: The Line-Crosser, 1993
- Novel: The Dangerous Edge, 1991
- Novel: Show Me A Hero, 1992
- Novel: A Time Without Shadows, 1990
- Novel: Deep Purple, 1989
- Novel: A Wilderness of Mirrors, 1988
- Novel: The Seeds of Treason, 1986
- Novel: The Crossing, 1987
- Novel: Shadow of Shadows, 1982
- Novel: Pay Any Price, 1983
- Novel: No Place to Hide, 1984
- Novel: The Girl From Addis, 1984
- Novel: The Judas Factor, 1984
- Novel: Children of Tender Years, 1985
- Novel: The Choice, 1986
- Novel: The Secret Whispers, 1981
- Novel: All Our Tomorrows, 1982
- Novel: The Lonely Margins, 1981 (as Patrick Kelly)
- Novel: The Other Side of Silence, 1981
- Novel: The Twentieth Day of January, 1980
- Novel: Codeword Cromwell, 1981 (as Patrick Kelly)
- Novel: The Alpha List, 1979
- Novel: The Reaper, 1980
- Novel: Consequence of Fear, 1979
- Novel: Italian Assets, 1976 (as Richard Butler)
- Novel: Moscow Quadrille, 1976
- Novel: The Only Good German, 1976
- Novel: The Man with the President's Mind, 1977
- Novel: The Lantern Network, 1978
- Novel: Where All the Girls Are Sweeter, 1975 (as Richard Butler)
- Novel: The Special Collection, 1975
- Novel: A Choice of Enemies, 1973
- Novel: Snowball, 1974
- Novel: Palomino Blonde, 1975
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