The Sea of Monsters

Riordan's sequel deepens everything that made the first book sing: the mythology gets wilder, the family secrets get heavier, and Percy learns his world isn't black and white. Kids who love Greek myths reimagined as summer-blockbuster adventure will tear through it, and parents will appreciate a story about a brother everyone shuns who turns out to be the hero. It's pure fun with real stakes—and a cliffhanger that reframes the whole series.

1. 1

   Act 1

   Dodgeballs of Fire and a Brother Revealed

   The dream comes first: Grover sprinting through a wedding boutique, a monster close behind, hiding in a wedding dress, calling for help—then nothing. Percy wakes on the last day of seventh grade at Meriwether College Prep. In gym class, a dodgeball game turns lethal when the opposing team reveals itself as Laestrygonian giants, hurling flaming dodgeballs—bronze cannonballs—at Percy and his classmates. Tyson, a homeless boy the school took in as a charity case, saves Percy by catching a flaming dodgeball and throwing it back, destroying a Laestrygonian. Annabeth Chase arrives at Meriwether College Prep from Camp Half-Blood, having been warned by Grover's emergency empathy-link distress and her own dreams that something was wrong. Together they finish the giants off. The three escape in a taxi driven by the Graeae, three old women sharing one eye, who argue over it mid-drive and demand payment. At Camp Half-Blood, Clarisse La Rue battles two bronze, fire-breathing Colchis bulls that have breached the camp's borders. Tyson crosses the camp's magical boundary to save Percy again—and the truth comes out. He's a young Cyclops, immune to fire, and a son of Poseidon, making him Percy's half-brother.

2. 2

   Act 2

   A Poisoned Tree and a Cursed Director

   The camp's protection is dying. Thalia's pine tree, which powers the camp's protective barrier, has been poisoned; Chiron is accused and fired as activities director. Before leaving, he tells Percy the only cure: the Golden Fleece. His replacement is Tantalus, a cursed king doomed to eternal hunger and thirst, and he's exactly as cruel as his punishment suggests. He reinstates the chariot races and shows blatant favoritism toward Clarisse. When Stymphalian birds—demon pigeons—attack the campers during a race, Percy and Annabeth scare them off with Chiron's boombox blasting 'The Ride of the Valkyries.' Tantalus sends Clarisse on the quest to retrieve the Golden Fleece and forbids anyone else from leaving camp. Hermes visits Percy, gives him a thermos full of winds and a bottle of multivitamins, and discusses his son Luke, saying 'I blame myself. I should have been there for him.' Defying Tantalus, Percy, Annabeth, and Tyson slip out of camp at night with help from Hermes' services and ride a hippocampus Percy names Rainbow across the sea.

3. 3

   Act 3

   Monsters, Witches, and a Wedding Dress

   Percy, Annabeth, and Tyson ride a hippocampus named Rainbow to the Princess Andromeda, a cruise ship filled with monsters and demigods allied with Kronos, where Luke captures them. He's working to revive Kronos, and he has a speech ready: 'The gods are using you, Percy. They don't care about us. They never have.' The trio escapes on an emergency lifeboat after Percy uses the thermos of winds to blast a hole in the ship. The trio takes shelter in a hideout Annabeth, Thalia, and Luke built as children; a hydra attacks, but Clarisse saves them on her ship, the CSS Birmingham. They join her quest into the Sea of Monsters, the Bermuda Triangle. To enter, the ship must pass between Charybdis, a giant whirlpool, and Scylla, a six-headed sea monster. Scylla snatches crew members; Charybdis swallows the ship, causing an explosion that destroys it, and Tyson is seemingly killed. Percy and Annabeth land on Circe's island spa, where Circe transforms Percy into a guinea pig, saying 'Men are such beasts.' Annabeth uses Hermes's multivitamins to restore him and accidentally frees Blackbeard and his crew, who overrun the island. Percy and Annabeth escape on the stolen Queen Anne's Revenge, which Percy can control with his mind as a son of Poseidon. They pass the Sirens, and Annabeth, hearing them, nearly jumps overboard, saying she heard her mother Athena's voice. Then, Polyphemus's island: On Polyphemus's island, they find Grover disguised in a wedding dress, pretending to be a female Cyclops; Grover says, 'He thinks I'm a lady Cyclops. He wants to marry me!'

4. 4

   Act 4

   The Fleece, the Confession, and the Girl Who Shouldn't Exist

   Polyphemus captures Clarisse and plans to marry her after discovering Grover is a male satyr. Tyson arrives alive, having been rescued by Rainbow from the shipwreck, and helps fight the Cyclops. Percy retrieves the Golden Fleece from Polyphemus's cave, but the monster destroys the Queen Anne's Revenge, and the group escapes on Rainbow and other hippocampi. In Miami, Percy gives the Fleece to Clarisse to fly back to camp alone. Luke captures him anyway, along with Annabeth, Grover, and Tyson, and takes them aboard the Princess Andromeda. But Percy turns the tables: through an Iris-message to Camp Half-Blood, he tricks Luke into confessing he poisoned Thalia's tree, clearing Chiron's name. Luke battles Percy, saying, 'You can't stop the rise of Kronos. The Golden Age is coming.' Chiron and the Party Ponies, a band of centaurs, arrive to rescue them. Oreius is killed by an arrow, and Agrius is kicked to death by Blackjack the pegasus. The Golden Fleece is hung on Thalia's pine tree, curing it and restoring the camp's borders. Grover earns a furlough on his quest to find Pan. At a second chariot race, Percy and Annabeth win with Tyson's help, using a wristwatch shield Tyson forged. Tyson accepts Poseidon's offer to work in the god's underwater Cyclops forges; he gives Percy a wristwatch that transforms into a shield, saying, 'I made it for you. To protect you.' Tantalus catches a cheeseburger just as he is dismissed by Dionysus, but he is returned to the Underworld before he can eat it. Dionysus says, 'That was cruel. I like it.' The Fleece's magic is too strong and resurrects Thalia Grace, a daughter of Zeus, as a girl about Percy's age; Percy realizes this was Kronos's plan all along to provide another candidate for the Great Prophecy.

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