This essay argues for the primacy of energy as an impetus in the writing of the Sudanese author al-Tayyib Salih. Taking his most famous novel, موسم الهجرة إلى الشمال (1966; Mawsim al-hijra ilā al-shimāl; Season of Migration to the North), as a case study, it explores the significance of climatic factors and of changes to energy regimes in the novel's plot, characterization, intertextuality, and postcolonial critique. Through the character of Mustafa Saʿid, it argues for a posthuman impulse in the novel, as Mustafa uncannily transforms from Faustian archetype to a fantastical, nonhuman force. It concludes by shifting to alternative forms of energy within Salih's writing, as the spiritual energy of the Sufi “unseen” meets the unheeding world of atoms, supercharged with new energies in the modern era.