With well over 50 books to her credit, Agatha Christie is someone I like to turn to when I'm in the mood for a quick, but good, mystery. In this one, detective Hercule Poirot receives an anonymous letter alluding to a crime that will soon take place. A woman whose name begins with a "A" is murdered in a town that also begins with an "A." The serial killer continues to send Poirot letters as he also continues through the alphabet. Small clues are dropped here and there as Poirot and others interview various suspects. As Poirot closes in on the killer, there is the expected plot twist that keeps everything fun. Poirot, as always, is a little on the obnoxious side, but I do love his clever powers of reasoning and deduction and Christie's play with narrative storytelling. Another satisfactory thriller.