I'm always reading something, usually multiple books at a time.
Although I recall seeing David Suchet's Hercule Poirot on the TV series Poirot, this is the first Agatha Christie I've read, and I thoroughly enjoyed it. A passenger is killed while lying in the bed of his sleeping car one night, and by coincidence, one of his fellow passenger on the same car is the renowned Belgian detective Hercule Poirot. The murderer must be one of the passengers in the train car!
It was fun to witness Poirot's process of investigation, and his gentle, methodical techniques. I can see why the book is considered a classic mystery.
[The victim was a man identified as "Ratchett," and every time I heard the narrator say it, I thought, "What about Clank?"]