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 Entertainment on and decided to use it as a basis of a collectible card game to take advantage of the CCG market and Daedalus published this game as "Shadowfist" (1995). Daedalus Entertainment published the role-playing game "Feng Shui" (1996), designed by Laws using a variant of the "Nexus" game system; Laws also designed supplements for "Feng Shui". When the CCG market crashed in 1997, the staff of Daedalus were laid off or quit, leaving Jose Garcia and his sister Maria as the only people working for the company. Daedalus filed for chapter 11 bankruptcy protection, and when the company sold off