Aristide Leonides is poisoned and suspicion falls on his beautiful, young widow but criminologist Charles Hayward has his doubts and sets out to find the real killer.

Set in the summer of 1917, the story follows the war-wounded Hastings to the Styles St. Mary estate of his friend John Cavendish. The Cavendish household is wrought with tension due to the marriage of John's widowed mother to a suspicious younger man. In the village, Hastings runs into his old friend Hercule Poirot and, when the estate's trouble turns deadly, the friends unite to solve a most baffling case.

When two seemingly unrelated murders occur, it's up to Superintendent Battle to go back twenty years to uncover the truth.

The coroner's verdict: suicide, after beautiful heiress Rosemary Barton dies from drinking a cyanide-laced glass of chanpagne at her own birthday party. Her husband George doesn't believe it, based on two anonymous letters that suggest murder. But who has a motive? Rosemary's lover or the lover's spurned wife, her penniless sister, or even George or his secretary? One year after her death, six gather for dinner in remembrance. The plan is to trap...

A killer stalks a group of ten total strangers on an isolated island off the Devon coast, in a suspenseful story of murder and retribution set to a sinister nursery rhyme.

A series of odd events at a youth hostel provide Hercule Poiret with one of his most baffling cases.

Lady Edgware asks for Poirot's help with her husband who is refusing to divorce her. When Lord Edgware is found murdered the next morning his wife is the primary suspect, but she was at a dinner party miles away with twelve witnesses to prove it. So why do others insist that she visited him on the night of the murder? Poirot will need all the help he can get from "his little gray cells" to figure out this case.

A would-be murderer makes a grave mistake when he shoots at his victim within a dozen yards of Hercule Poirot.

"Framed in the doorway of Hercule Poirot's bedroom stands an uninvited guest, coated from head to foot in dust. The man stares for a moment, then he sways and falls. Who is he? Is he suffering from shock or just exhaustion? Above all, what is the significance of the figure 4, scribbled over and over again on a sheet of paper? Poirot finds himself plunged into a world of international intrigue, risking his life--and that of his 'twin brother'--to uncover...

Miss Marple encounters a compelling murder mystery in St. Mary Mead, where under the seemingly peaceful exterior of an English country village lurks intrigue, guilt, deception, and death. Colonel Protheroe, local magistrate and overbearing landowner is the most detested man in the village. Everyone—even in the vicar—wishes he were dead. And very soon he is—shot in the head in the vicar’s own study. Faced with a surfeit of suspects, only the...