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
Lake Van Monster Lake Van Monster The Lake Van Monster () is a lake monster that allegedly lives in Lake Van in eastern Turkey. The Armenian chroniclers Movses Khorenatsi and Anania Shirakatsi wrote about vishaps living in Lake Van. According to the legend, the god Vahagn, the "vishapakagh" ("reaper of vishaps"), would plunge into Lake Van to drag out any vishap that had grown large enough to devour the world. Scholar James Russell considers that this legend is an Armenian adoption of Urartian myths concerning the combat of the god Teisheba with the water monster Ullikummi. Russell writes that into the modern period,