Main character: Bernard Samson, a British intelligence officer working for the Secret Intelligence Service (SIS).
Setting: England, Europe, Latin America
The novels were issued as three sets of trilogies, plus one "prequel."
Bold type indicates a book I've read.
Berlin Game (1983)
Mexico Set (1984)
London Match (1985)
Spy Hook (1988)
Spy Line (1989)
Spy Sinker (1990)