"And Then There Were None" is a mystery novel by Agatha Christie that follows ten strangers invited to a remote island. Each guest is accused of a crime and soon realizes they are being targeted by an unknown assailant. As they are killed one by one, paranoia and suspicion grow among the survivors. The story explores themes of justice and morality, as the characters confront their pasts. The title refers to a nursery rhyme that foreshadows the fate of the guests. Ultimately, the novel is a gripping tale of suspense and intrigue, showcasing Christie's masterful storytelling.