Ordeal by innocence : 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.

Cat among the pigeons : Unpleasant things are going on in an exclusive school for girls – things like murder… Late one night, two teachers investigate a mysterious flashing light in the sports pavilion, while the rest of the school sleeps. There, among the lacrosse sticks, they stumble upon the body of the unpopular games mistress – shot through the heart from point blank range. The school is thrown into chaos when the ‘cat’ strikes again. Unfortunately, schoolgirl Julia Upjohn knows too much. In particular, she knows that without Hercule Poirot’s help, she will be the next victim…