While I do read mysteries on a fairly regular basis - among other things, as variety is the spice of life - I don't gravitate that often to Agatha Christie. And when I do read her it's more often Miss Marple than Hercule Poirot. Nonetheless I did read her Poirot novel The ABC Murders and was glad I did. Notable things about it:
* It was published in 1936 and concerns an apparent serial killer, although not described in those terms. Christie was well ahead of the curve here in terms of cultural obsessions. Classic detectives like Poirot don't generally look into serial killings, although Ellery Queen did in Cat of Many Tails.
* But the case isn't quite what it appears to be. Christie changes things up in the eleventh hour, momentarily getting the reader off-balance perhaps.
* While Christie might have a reputation as something of a snob, that doesn't really come through in this novel. The victims cut across class lines and all are taken seriously. All the families have complex reactions, too.