The Murder of Roger Ackroyd by Agatha Christie (1926) 221 pages
This is one of the few books by Agatha Christie where I remembered who the murderer was. Even though I've now read it at least three times, I continue to enjoy this Hercule Poirot mystery.
Doctor James Sheppard is a friend of Roger Ackroyd, who is killed with a Tunisian dagger from his own collection. When Ackroyd's niece pleads with Poirot to take the case, he agrees to come out of retirement in this small village called King's Abbot. Instead of Poirot's longtime associate Hastings narrating this story, Doctor Sheppard tells the story of the murder investigation. It's a tale not only of murder, but also blackmail, suicide and a missing person. We see Poirot's meticulous use of his "little grey cells" (plus his somewhat over-sized ego) to sort it all out. If you read it, you'll see why it's such a memorable book.