“And Then There Were None” and “The Murder of Roger Ackroyd”

We’ve never read mystery legend Agatha Christie here, so we’re going to focus on two of her most fiendishly clever books. “And Then There Were None” finds eight strangers gathered, by invitation, at a house on a small, isolated island. Before long, the guests start dying one by one. In “The Murder of Roger Ackroyd,” the Belgian detective Hercule Poirot investigates the death of the title character, a wealthy man whose fiancée has recently died by suicide.