#1 Roseanna (1965)
#2 The Man Who Went Up in Smoke (1966)
#3 The Man on the Balcony (1967)
#4 The Laughing Policeman (1968) (Edgar Award, Best Novel, 1971)
#5 The Fire Engine That Disappeared (1969)
#6 Murder at the Savoy (1970)
#7 The Abominable Man (1971)
#8 The Locked Room (1972)
#9 Cop Killer (1974)
#10 The Terrorists (1975)
Source: Wikipedia
