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
Labyrinth be walked. Unicursal patterns have been used historically both in group ritual and for private meditation, and are increasingly found for therapeutic use in hospitals and hospices. "Labyrinth" is a word of pre-Greek origin, which the Greeks associated with the palace of Knossos in Crete, excavated by Arthur Evans early in the 20th century. The word appears in a Linear B inscription as da-pu-ri-to. As early as 1892 Maximilian Mayer suggested that "labyrinthos" might derive from "labrys", a Lydian word for "double-bladed axe". Evans suggested that the palace at Knossos was the original labyrinth, and since the double axe motif