"The Affair" is a novel by Lee Child featuring the iconic character Jack Reacher. Set in 1997, it serves as a prequel to the earlier books in the Reacher series, exploring the events that lead to his nomadic lifestyle. The story unfolds in a small town in Mississippi, where Reacher investigates a murder that intertwines with a larger conspiracy. As Reacher delves deeper into the case, he encounters various characters, including local law enforcement and a mysterious woman. The novel combines elements of mystery and thriller, showcasing Reacher's resourcefulness and moral code as he seeks justice while navigating the complexities of the town's secrets.