"The Lion's Game" is a thriller novel by author Nelson DeMille, featuring the character John Corey, a former NYPD homicide detective. The story follows Corey as he investigates a series of murders linked to a terrorist known as The Lion, who has escaped from a Libyan prison. As Corey delves deeper into the case, he uncovers a complex web of deception and danger. The novel explores themes of justice, revenge, and the psychological impact of terrorism, while also providing a mix of suspense and dark humor throughout the narrative.