Murder is Announced

In Agatha Christie's 1950 novel A Murder is Announced, Miss Marple investigates after a mysterious local newspaper notice invites villagers to a "murder" at Little Paddocks, which leads to the shooting death of a young Swiss waiter, ultimately revealing that the estate's hostess, Miss Blacklock, staged the event and committed the murder to conceal her true identity as Letitia Blacklock to claim a massive inheritance.