Percy holds the sky so Artemis can fight the Titan who wants Olympus.
Who drives the story
Son of Poseidon, fourteen and stubborn, who crashes a quest he wasn't chosen for. He defeats the Nemean Lion, carries the sky so Artemis can fight, and ends the book holding two new griefs: Bianca's death and Nico's hatred.
Daughter of Athena, snatched by the manticore and used as bait by Luke. She survives holding up the sky and finally lets Percy see she was scared.
Artemis's lieutenant, a banished daughter of Atlas who once helped Hercules. She leads the quest, is mortally wounded by her father, and becomes the constellation the Huntress.
New demigod who joins the Hunters to escape caring for her brother Nico. She dies disabling Talos in the junkyard of the gods, fulfilling the prophecy.
Bianca's younger brother, a mythomagic-obsessed kid at the start. When Percy tells him Bianca is dead, he reveals himself as a son of Hades and flees, vowing revenge.
Daughter of Zeus, fierce and wary of the Hunters' offer. She clashes with Percy over leadership, then joins the Hunters at the solstice, dodging the Great Prophecy at sixteen.
Satyr and Percy's protector, disguised as a student at Westover Hall. He calms the Erymanthian Boar with nature magic and rides it with the quest.
Son of Hermes, now openly serving Kronos and raising the Titan lord. He uses Annabeth as bait and falls from a cliff during the fight with Atlas, seemingly to his death.
Goddess of the Hunt, who leaves her Hunters to stalk a monster alone and is captured at Atlas's fortress. She tricks Atlas back under the sky and turns Zoë into a constellation.
The General, the Titan who holds up the sky and wants Olympus. He kills his own daughter Zoë before Artemis forces him back under his burden.
Cow serpent whose sacrifice could destroy Olympus. Percy promises to protect it and sends it to Poseidon's palace; the gods spare it.
Also in the story
Mortal girl at Hoover Dam who can see through the Mist. She saves Percy by throwing a hairbrush at a skeleton warrior.
How they are connected
He defeats the Nemean Lion, carries the sky so Artemis can fight, and ends the book holding two new griefs: Bianca's death and Nico's hatred.
He defeats the Nemean Lion, carries the sky so Artemis can fight, and ends the book holding two new griefs: Bianca's death and Nico's hatred.
He defeats the Nemean Lion, carries the sky so Artemis can fight, and ends the book holding two new griefs: Bianca's death and Nico's hatred.
Daughter of Athena, snatched by the manticore and used as bait by Luke.
She survives holding up the sky and finally lets Percy see she was scared.
Artemis's lieutenant, a banished daughter of Atlas who once helped Hercules.
Artemis's lieutenant, a banished daughter of Atlas who once helped Hercules.
Bianca di AngeloNico di Angelo
New demigod who joins the Hunters to escape caring for her brother Nico.
She clashes with Percy over leadership, then joins the Hunters at the solstice, dodging the Great Prophecy at sixteen.
Satyr and Percy's protector, disguised as a student at Westover Hall.
He uses Annabeth as bait and falls from a cliff during the fight with Atlas, seemingly to his death.
Goddess of the Hunt, who leaves her Hunters to stalk a monster alone and is captured at Atlas's fortress.
Go deeper
The weight you choose · Girls who choose their own side · Prophecy as trap · Fathers who fail
Themes explainedThe full story act by act, the ending explained and a quick quiz.
Open the summary