"The Mule" is a science fiction novel by Isaac Asimov, part of his larger Foundation series. It tells the story of a powerful mutant known as the Mule, who has the unique ability to manipulate emotions. This power allows him to conquer vast territories and disrupt the predicted decline of the Galactic Empire. The narrative follows the efforts of Hari Seldon's followers to stop the Mule's rise. As they navigate political intrigue and personal challenges, they seek to restore the original plan for the future of humanity. The novel explores themes of power, control, and the unpredictability of history.