The Battle of the Labyrinth

The Battle of the Labyrinth is the fourth book of the Percy Jackson series written by Rick Riordan.

Plot
The book begins with Percy going to a freshmen orientation class at Goode High School, a school where Paul Blofis, his mom's boyfriend, teaches. While there, he meets Rachel Elizabeth Dare, a clear-sighted mortal whom he met previously in Hoover Dam in The Titan's Curse, and is attacked by two Empousai, Tammi and Kelli. Percy slays Tammi, but Kelli got away. Unfortunately, Paul and some freshmen saw the incident. They escape through a broken window, and Percy, along with Annabeth, make their way to camp.

After arriving in camp, Percy stops by the arena and saw "the biggest hellhound he ever seen", Mrs. O'Leary. He tries to stab her, but is soon parried by Quintus, the new sword-master, who reveals that Mrs. O'Leary is his pet. Chiron comes over and picks up Percy. He drops him next to Annabeth, Clarisse and a crying nymph, Juniper. Percy soon figures out that Grover has only one week to find Pan, the God of Wild Places. Percy rushes over to his cabin to clean up his cabin for the cabin inspection. As soon as he reached the Poseidon cabin, he sees his half-brother, Tyson, cleaning up. Tyson hugs him and has fixed his broken shield, the one he broke last winter during the fight with the manticore, Dr. Thorn. Later, in a camp game designed by Quintus, Annabeth and Percy were attacked by three giant scorpions, and find an entrance to the Labyrinth, a magical underground maze, under Zeus's Fist within the the heart of camp. In a dream, Percy finds out that Luke plans to use the Labyrinth entrance to invade Camp Half-Blood. Annabeth leads a quest with Percy, Grover and Tyson to find Daedelus, the maze's creator. Grover believes he can also find Pan somewhere in the Labyrinth. In the Labyrinth, they come across the minor god Janus, the Queen of Olympus Hera, and rescue an ancient Hundred-Handed One, Briares, from Kampê. They then meet Nico di Angelo at the Triple G Ranch. After defeating Geryon, a triple-bodied monster, at the ranch, they continue on their way, parting paths with Nico, who makes amends with Percy. Once back in the Labyrinth, the foursome match wits with a Sphinx. They then split up when Grover claims he can hear Pan calling to him. After a meeting with Hephaestus, Annabeth and Percy go searching for monsters that are invading the forge god's territory, which is also Mt. St. Helens. Before battling the half-dog, half-sea lion monsters called telekhines, Annabeth kisses Percy because she believes that Percy may die. Percy summons water from within himself to defeat the monsters, but the resulting explosion sends him to a phantom island called Ogygia. Percy encounters a girl named Calypso, who is a daughter of Atlas, and a titan. Calypso falls in love with Percy, but Percy leaves her when he learns that Camp Half-blood is in danger. With the help of Calypso, he gets back to camp.

Percy realizes that a mortal he knows knows the way through the Labyrinth, so he, Annabeth, and Rachel go back to the Labyrinth and go looking for Grover and Tyson. They find Nico, while they battle Minos, Kelli and some giants that try to attack Daedalus. Rachel, Percy, Annabeth and Nico uses a pair of golden wings to escape, leaving Daedalus, who stays to help Mrs. O'Leary. Percy then opens Kronos's sarcophagus and finds Luke's body. This means that Kronos is back and has fused his own and Luke's forms. Percy tries to run from Kronos and Rachel throws a hairbrush at the Titan's face. Luke yells in pain, but Kronos comes back into control as they escape. The three then find Grover and Tyson, who find Pan, and watch Pan as he dies. Then, the four go back to camp and fight in a war between the monsters and the campers. With the help of a terrible cry emitted from Grover, the monsters retreat from the battle, and then Percy goes home. Poseidon arrives for Percy's fifteenth birthday so Percy could explain everything to him. Poseidon tells Percy he is his favorite son before leaving. For his birthday, he calls Tyson to his house and Nico comes too. Nico says that he knows how to beat Kronos. The book ends at a cliffhanger as Percy tells Nico, "Come in and have some cake and ice cream. Sounds like we've got a lot to talk about."

Prophecy
This book's prophecy is given to Annabeth Chase.


 * You shall delve in the darkness of the endless maze, (Going into the Labyrinth)
 * The dead, the traitor, and the lost one raise. (Nico raising dead, Ethan joins Kronos after Percy saves his life, and Pan)
 * You shall rise or fall by the ghost king's hand, (Nico choosing the good side so the rise)
 * The child of Athena's final stand. (Daedalus)
 * Destroy with a hero's final breath, (Daedalus dying to destroy the Labyrinth)
 * And lose a love to worse than death. (Luke becoming Kronos' host body)

Chapter list

 * 1) I Battle the Cheerleading Squad 
 * 2) The Underworld Sends Me a Prank Call
 * 3) We Play Tag with Scorpions
 * 4) Annabeth Breaks the Rules
 * 5) Nico Buys Happy Meals for the Dead
 * 6) We Meet the God with Two Faces
 * 7) Tyson Leads a Jailbreak
 * 8) We Visit the Demon Dude Ranch
 * 9) I Scoop Poop 
 * 10) We Play the Game Show of Death
 * 11) I Set Myself on Fire 
 * 12) I Take a Permanent Vacation
 * 13) We Hire a New Guide
 * 14) My Brother Duels Me to the Death
 * 15) We Steal Some Slightly Used Wings
 * 16) I Open a Coffin
 * 17) The Lost God Speaks
 * 18) Grover Causes a Stampede
 * 19) The Council Gets Cloven
 * 20) My Birthday Party Takes a Dark Turn

Characters

 * Percy Jackson - Main protagonist (son of Poseidon), friends with Rachel and Annabeth. Tyson the Cyclops is his half brother.
 * Annabeth Chase - Daughter of Athena, friends with Percy.
 * Rachel Elizabeth Dare - A mortal that can see through the mist. She is also Percy's friend.
 * Grover Underwood - A Satyr, and also Percy's best friend. Hates underground places. Becomes a Lord of Wild and a Chosen One of Pan.
 * Tyson - A friendly Cyclops who is a half brother to Percy.
 * Daedalus - Son of Athena, inventor, and creator of the Labyrinth. In the end he turns out to be Quintus and commited suicide to stop Luke and his army in the Labyrinth because the Labyrinth is tied to his life.
 * Nico di Angelo - Son of Hades.
 * Luke Castellan- Son of Hermes, and on Kronos' side.
 * Kronos- rises in the end of the book, possessing Luke.

Deaths

 * Castor - Son of Dionysus/ Mr. D, killed by an enemy half-blood.
 * Lee Fletcher - Son of Apollo, killed by a giant's club.
 * Daedalus - He had Nico declare his death to destroy the Labyrinth.
 * Pan - Faded because of the pollution to his territory.
 * Kampe - Briares buried her in rocks.
 * Kelli - Stabbed by Annabeth.

Monsters

 * Tyson
 * Briares
 * Kampe
 * Telekhines
 * Sphinx
 * Geryon
 * Empousai