Serialisations

1930's

1931:

Peril at End House 1931 (Liberty Magazine – US) [+ HP and JJ]
Published in the UK later the same year under the title The Peril at End House.

1933:

13 for Dinner 1933 (The American Magazine – US)¹ [+ HP and JJ]

1935:

The A.B.C. Murders 1935 (Hearst's International Combined with Cosmopolitan – US) [+ HP and JJ]
Published in the UK later the same year: British serialisation.

1936:

Poirot Loses a Client 1936 (The Saturday Evening Post – US) [+ HP]
Published in the UK the following year under the title Mystery of Littlegreen House (Woman's Pictorial)²

¹ The serialisation is (later) published in book form under the titles Lord Edgware Dies (1933 UK) and 13 at Dinner (1933 US).