The Battle of the Labyrinth is about Percy, Anabeth, Grover, and Tyson navigating the labyrinth to find Daedelus and stop Kronos from invading and destroying camp. They find Pan, the wilderness god, but he dies. Then Kronos is restored but can’t lead the attack because Percy collapses his throne room on him. The monsters still attack camp, but are weaker without Kronos.
I would recommend this book to people who like mythology and action.