"Xenocide" is a science fiction novel by Orson Scott Card, published in 1991. It is the third book in the Ender's Game series and explores complex themes such as morality, identity, and the consequences of human actions. The story follows Ender Wiggin and his companions as they grapple with the ethical dilemmas of interspecies relationships and the survival of the Pequeninos, a sentient alien species. The plot centers around the struggle to save the Formic species and the Pequeninos from extinction while dealing with the implications of a powerful virus. As characters confront their beliefs and the nature of existence, the novel raises questions about what it means to be truly alive and the responsibilities that come with advanced technology.