The Detectives - Tommy & Tuppence

The Secret Adversary
John Lane (The Bodley Head), 1922
[US] Dodd Mead, 1922

Partners in Crime
Collins, 1929
[US] Dodd Mead, 1929

N or M ?
Collins, 1941
[US] Dodd Mead, 1941

By the Pricking of My Thumbs
Collins, 1968
[US] Dodd Mead, 1968

Postern of Fate
Collins, 1973
[US] Dodd Mead, 1973