The Battle of the Labyrinth camp for the school year. On his fifteenth birthday at the summer's end, Percy receives a visit from his father Poseidon, who gives him a sand dollar, admonishing him to “spend it wisely”. Nico later appears to tell Percy his plan to defeat Luke once and for all. "The Battle of the Labyrinth" was initially referred to as "Percy 4" until the title was officially revealed. The novel was teased by Rick Riordan behind the pages of its predecessor, "The Titan's Curse". It was based on the Greek myth of the labyrinth, where the Minotaur was supposedly kept. In his
Daedalus was able to rejuvenate the old (the scene on the jug seems to show her doing just this)". The image of Daedalus demonstrates that he was already well known in the West. Further to the west Daedalus arrived safely in Sicily, in the care of King Cocalus of Kamikos on the island's south coast; there Daedalus built a temple to Apollo, and hung up his wings, an offering to the god. In an invention of Virgil ("Aeneid" VI), Daedalus flies to Cumae and founds his temple there, rather than in Sicily; long afterward Aeneas confronts the sculpted golden doors of