The Battle of the Labyrinth is a 2008 fantasy-adventure novel based on Greek mythology; it is the fourth novel in the Percy Jackson & the Olympians series by Rick Riordan. Fictional demigod Percy Jackson (who is fifteen years old by the end of the book) attempts to stop Luke Castellan and his army from invading Camp Half-Blood through Daedalus's labyrinth by trying to convince the inventor not to give Luke Ariadne's string. It was released on 6 May 2008 in the US and Canada.
You shall delve in the darkness of the endless maze,
The dead, the traitor, and the lost one raise.
You shall rise or fall by the ghost king's hand,
The child of Athena's final stand.
Destroy with a hero's final breath,