Skin Game is the fifteenth book in The Dresden Files series, written by Jim Butcher. The story follows the wizard detective Harry Dresden, who is approached by his longtime nemesis, Nicodemus Archleone, with a tempting offer he can't refuse. Nicodemus wants Harry to join his team in a high-risk heist to steal the Holy Grail from the vault of Hades, the Greek god of the underworld. Harry knows he's walking into a trap, but he accepts the offer because he needs the money to help a friend in dire need. As the heist unfolds, Harry finds himself facing dangerous challenges and unexpected surprises that test his skills and his loyalty. The story is a thrilling ride full of magic, action, and suspense, as Harry tries to outwit his enemies and stay alive long enough to complete the mission.