"Consider Phlebas" is a science fiction novel by Iain M. Banks, published in 1987. It is the first book in the Culture series, which explores a post-scarcity society where advanced technology and artificial intelligence play significant roles. The story follows a shape-shifting mercenary named Horza, who is tasked with capturing a powerful AI during a war between the Culture and the Idirans. The novel is set against the backdrop of a galactic conflict, highlighting themes of loyalty, identity, and the nature of war. As Horza navigates various challenges, readers are introduced to the complexities of the Culture and its contrasting values with the Idirans. The narrative combines action, philosophical questions, and rich world-building.