Hugo Bishop
Pawn in Jeopardy (1954)
     aka Dead Silence
Rook's Gambit (1955)
     aka Dead Circuit
Bishop in Check (1971)
Queen in Danger (1972)
Knight Sinister (1973)

Quiller
1. The Berlin Memorandum (1965)
     aka The Quiller Memorandum
2. The 9th Directive (1966)
3. The Striker Portfolio (1968)
4. The Warsaw Document (1970)
5. The Tango Briefing (1973)
6. The Mandarin Cypher (1975)
7. The Kobra Manifesto (1976)
8. The Sinkiang Executive (1978)
9. The Scorpion Signal (1979)
10. The Pekin Target (1981)
     aka The Peking Target
11. Northlight (1985)
     aka Quiller
12. Quiller's Run (1988)
13. Quiller KGB (1989)
14. Quiller Barracuda (1990)
15. Quiller Bamboo (1991)
16. Quiller Solitaire (1992)
17. Quiller Meridian (1993)
18. Quiller Salamander (1994)
19. Quiller Balalaika (1996)