"Foundation and Empire" is the second novel in Isaac Asimov's renowned Foundation series, which continues the saga of the Foundation established by Hari Seldon to preserve knowledge and civilization. The story is divided into two distinct parts, each exploring different challenges facing the Foundation. The first part details the Foundation's encounters with the remnants of the Galactic Empire, revealing an inner conflict and showcasing the rise of powerful individuals who threaten Seldon's plan.
The second part introduces the concept of the Mule, a mutant with extraordinary mental capabilities, who poses a significant threat to the Foundation's future. His ability to manipulate emotions and alter the will of individuals creates chaos and disrupts the expected trajectory of history as predicted by Seldon's psychohistory. The struggle against the Mule tests the Foundation's resilience and adaptability.