Fire (Swedish: Eld) is the second part of the Engelsfors trilogy by Mats Strandberg and Sara Bergmark Elfgren and the sequel to Cirkeln. It takes place about 10 weeks after the events of the first novel. It follows the same fantasy like the first and further develops themes of horror fiction, psychological realism and an unreliable narrator(s). The plot also makes analogies to the effects of global warming on Sweden's subarctic climate and the group behaviour dynamics of political, religious and ideological extremist groups.