Grover the satyr and a keeper, goes undercover at Yancy Academy as a disabled student in order to discover if there bloods who attend to kill crips because most half-bloods have AD-HD and dyslexia and can do special things. There he discovers Percy Jackson, a half-blood, and alerts Mr. Brunner the Latin teacher, who turns out to be Chiron, Camp Half-Blood's activities director. Grover reveals his satyr form to Percy when the Jacksons go to a beach house in Montauk, New York before they are attacked by a minotaur. He accompanies Percy along with Annabeth Chase, Athena's daughter, on a quest to the Underworld to retrieve Zeus's stolen Master Lightning Bolt. At the end of the book Grover gets his searchers license to go look for Pan, the god of the Wild.