<P> After a harrowing experience at his school trip, Percy Jackson returns home for the summer vacation, wherein him and his mother Sally Jackson, travel to their cabin in Montauk to take their mind off things. However, the trip is cut short after a series of harrowing incidents, such as being attacked by the Minotaur . Percy finds himself at Camp Half - Blood, a training camp for demigods like him . He discovers that he is a demigod, son of Poseidon, the Greek god of the sea, earthquakes, and father of all horses, (which he made from sea foam). Percy also learns that his best friend, Grover Underwood, is actually a satyr, and that the Greek gods are accusing Percy of having stolen Zeus' master lightning bolt, the most powerful weapon in the world . To clear his name and save the world from another war between the Olympian gods, Percy sets out to retrieve the lightning bolt from Hades, who is suspected of being the real thief . Thus, Percy, Grover, and Annabeth Chase, a daughter of Athena, start on a journey to the underworld, facing numerous mythological monsters on the way . After confronting an innocent Hades, they learn that their friend Luke Castellan, son of Hermes, is the real thief who stole the bolt to allow Kronos, the defeated king of the Titans, a chance to rise again . </P> <P> The book was adapted into a film by Chris Columbus and 20th Century Fox, under the title Percy Jackson & the Olympians: The Lightning Thief, and was released on February 12, 2010 . </P> <P> The Sea of Monsters is the second installment in the series, released on April 1, 2006 . </P> <P> Camp Half - Blood is under attack when Thalia's tree, which guards the borders of the camp, is poisoned and slowly begins to die . In order to save the tree and the camp, someone must recover the Golden Fleece, which is somewhere in the Sea of Monsters . At the same time, Percy finds out that Grover, who has left on a quest to find the missing god Pan, has been captured by the cyclops Polyphemus and that the Fleece is on Polyphemus' island . Together with Annabeth and his half - brother Tyson, a cyclops, Percy sets out to rescue Grover . Meanwhile, Clarisse La Rue, daughter of Ares, is sent on an official quest by Camp Half - Blood to retrieve the Fleece . The trip to the Sea of Monsters is long and hazardous and along the way the heroes encounter several dangers including Scylla and Charybdis, the sorceress Circe, the Sirens and their former friend Luke Castellan . Percy also learns about a prophecy from the Oracle about a child of one of the three most important gods (Zeus, Poseidon and Hades), playing a vital part in the success or failure of the resurrection of Kronos the Titan - King . The heroes eventually retrieve the Fleece and restore Thalia's tree but also unknowingly revive Thalia herself, daughter of Zeus, who had been turned into the tree by her father when she died . </P>

What is the name of the 2nd percy jackson book