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Third Girl

A Hercule Poirot Mystery: The Official Authorized Edition

Agatha Christie

288 Pages

On-Sale Date: 10/02/2026

ISBN: 9780063376960

Trim Size: 4.710in x 7.170in x 1.040in

Format:

$18.99

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In this exclusive authorized edition from the Queen of Mystery, a young woman announces to Hercule Poirot that she’s a murderer and then disappears, leaving the masterful investigator to figure out whether she is a criminal, a victim, or merely insane. Now with a beautiful new series look!

Three young women share a London flat. The first is a coolly efficient secretary. The second is an artist. The third interrupts Hercule Poirot’s breakfast confessing that she is a murderer—and then promptly disappears.

Slowly, Poirot learns of the rumors surrounding the mysterious third girl, her family, and her disappearance. Yet hard evidence is needed before the great detective can pronounce her guilty, innocent, or insane.…

Agatha Christie is the most widely published author of all time, outsold only by the Bible and Shakespeare. Her books have sold more than a billion copies in English and another billion in a hundred foreign languages. She died in 1976, after a prolific career spanning six decades.

“Agatha Christie was a revolutionary writer; one of the first to make the detective story accessible, with clean, easy prose.” — Kate Mosse, New York Times bestselling author of Labyrinthe

“A beautifully set trap.” — New York Times

“First class Christie.” — Sunday Telegraph (London)