Action fiction is a genre in literature that focuses on stories involving high-stakes, high-energy, and fast-paced events. This genre includes a wide range of subgenres, such as spy novels, adventure stories, tales of terror, intrigue, and mysteries. These kinds of stories use suspense, the tension that is built up when the reader wishes to know how the conflict between the protagonist and antagonist is going to be resolved or the solution to a mystery of a thriller.