On March 16, 2016, Mann announced that he was developing a Heat prequel novel, as a part of launching his company Michael Mann Books. On April 27, 2017, Reed Farrel Coleman joined the project as co-author. On May 15, 2020, Mann stated that the novel would function as both a prequel and a sequel, with plot taking place before and after the film's main events. By January 19, 2022, it was revealed that the novel would be a collaboration between Mann and Meg Gardiner; it was subsequently released in August 2022. The title is Heat 2.
