1. Murder on the Orient Express: A classic mystery novel featuring Hercule Poirot, set on a luxurious train journey through Europe.
2. And Then There Were None: A chilling mystery novel about ten strangers invited to a remote island, who are systematically killed off.
3. The Murder of Roger Ackroyd: A groundbreaking novel that features Poirot and introduces the concept of the unreliable narrator, which was considered controversial at the time.