Krystyna Bockenheim Book order (chronological)

Mr Shaitana was famous as a flamboyant party host. Nevertheless he was a man of whom everybody was a little afraid. So, when he boasted to Poirot that he considered murder an art form, the detective had some reservations about excepting a party invitation to view Shaitana's private collection.

Sheila Webb, typist-for-hire, has arrived at 19 Wilbraham Crescent in the seaside town of Crowdean to accept a new job. What she finds is a well-dressed corpse surrounded by five clocks. Mrs. Pebmarsh, the blind owner of No. 19, denies all knowledge of ringing Sheila's secretarial agency and asking for her by name -- yet someone did. Nor does she own that many clocks. And neither woman seems to know the victim. Colin Lamb, a young intelligence specialist working a case of his own at the nearby naval yard, happens to be on the scene at the time of Sheila Webb's ghastly discovery. Lamb knows of only one man who can properly investigate a crime as bizarre and baffling as what happened inside No. 19 -- his friend and mentor, Hercule Poirot.

Recovering from amnesia, Dr. Arthur Calgary discovers that he alone could have provided an alibi in a scandalous murder trial. It ended in the conviction of Jacko Argyle. The victim was Jacko's own mother, and to make matters worse, he died in prison. But the young man's innocence means that someone else killed the Argyle matriarch, and would certainly kill again to remain in the shadows. Shaded in the moral ambiguity of murder, the provocative psychological puzzler of guilt, vengeance, and blood secrets is among Agatha Christie's personal favorites.