In this breathtaking Agatha Christie mystery, the Third Girl sharing a London flat with two others announces to Hercule Poirot that she's a murderer and then disappears. The masterful investigator must figure out whether the missing girl is a criminal, a victim, or merely insane.

Three young women share a London flat. The first is a coolly efficient secretary. The second is an artist. The third interrupts

...

Fifteen years after the double suicide of General and Lady Ravenscroft, Hercule Poirot uncovers some bizarre aspects of the incident.

Tommy and Tuppence Beresford have just become the proud owners of an old house in an English village. Along with the property, they have inherited some worthless bric-a-brac, including a collection of antique books. While rustling through a copy of The Black Arrow, Tuppence comes upon a series of apparently random underlinings. However, when she writes down the letters, they spell out a very disturbing message: "Mary Jordan did not die naturally."...

Five complete, unabridged books in one volume.