(Detektiv-)romaner & Novellsamlingar

1920-talet

1922:

The Secret Adversary 1922

1923:

The Murder on the Links 1923

1924:

The Man in the Brown Suit 1924

1925:

Poirot Investigates 1925

The Secret of Chimneys 1925

1926:

The Murder of Roger Ackroyd 1926

The Mysterious Affair at Styles. A Detective Story 1926

1927:

The Mysterious Affair at Styles. A Detective Story 1927
Utgåvan är utgiven i ytterligare en tryckning samma år: Fourth Printing.

1928:

The Mystery of the Blue Train 1928