Three Act Tragedy. Originally published: London : Collins, 1935 - Sad Cypress. Originally published: London : Collins, 1940 - Evil Under the Sun. Originally published: London : Collins, 1941 - The Hollow. Originally published: London : Collins, 1946.
Poirot : four classic cases by Agatha Christie. ISBN 0007190654. Published by HarperCollins in 2004. Publication and catalogue information, links to buy online and reader comments.