The Mysterious Affair at Styles

"When Emily Inglethorp, the wealthy owner of Styles Court, falls victim to strychnine poisoning, suspicion lands on her caddish new husband. Captain Hastings, who is convalescing at Styles, calls on his friend Hercule Poirot to investigate, and the Belgian sleuth is soon on hands to help Inspector Japp solve the case. Published in 1920, Agatha Christie's sparkling debut novel set her on the path to becoming the undisputed Queen of Crime"--