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 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.…

Published
November 1, 1966
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Hercule Poirot

The series

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#1 · 1920The Mysterious Affair at Styles #2 · 1923The Murder on the Links #3 · 1924Poirot Investigates #4 · 1926The Murder of Roger Ackroyd #5 · 1927The Big Four #6 · 1928The Mystery of the Blue Train #7 · 1930Black Coffee #8 · 1932Peril at End House #9 · 1933Lord Edgware Dies #10 · 1934Murder on the Orient Express #11 · 1935Three Act Tragedy #12 · 1935Death in the Clouds #13 · 1936The A.B.C. Murders #14 · 1936Murder in Mesopotamia #15 · 1936Cards on the Table #16 · 1937Murder in the Mews #17 · 1937Dumb Witness #18 · 1937Death on the Nile #19 · 1938Appointment with Death #20 · 1938Hercule Poirot's Christmas #21 · 1939The Regatta Mystery and Other Stories #22 · 1940Sad Cypress #23 · 1940One, Two, Buckle My Shoe #24 · 1941Evil Under the Sun #25 · 1942Five Little Pigs #26 · 1946The Hollow #27 · 1947The Labors of Hercules #28 · 1932The Witness for the Prosecution and Other Stories #29 · 1948Taken at the Flood #30 · 1950Three Blind Mice and Other Stories #31 · 1951The Under Dog and Other Stories #32 · 1952Mrs. McGinty’s Dead #33 · 1953After the Funeral #34 · 1955Hickory Dickory Dock #35 · 1956Dead Man's Folly #36 · 1959Cat Among the Pigeons #37 · 1960The Adventure of the Christmas Pudding #38 · 1961Double Sin and Other Stories #39 · 1963The Clocks #40 · 1966Third Girl #41 · 1969Hallowe'en Party #42 · 1972Elephants Can Remember #43 · 1974Poirot's Early Cases #44 · 1975Curtain #45 · 1991Problem at Pollensa Bay and Other Stories #46 · 1997The Harlequin Tea Set and Other Stories
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