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 the temple. Minos, meanwhile, searched for Daedalus by traveling from city to city asking a riddle. He presented a spiral seashell and asked for a string to be run through it. When he reached Kamikos, King Cocalus, knowing Daedalus would be able to solve the riddle, privately fetched the old man to him. He tied the string to an ant which, lured by a drop of honey at one end, walked through the seashell stringing it all the way through. Minos then knew Daedalus was in the court of King Cocalus and demanded he be handed over. Cocalus managed to