Summary
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At the beginning of the book Percy is running away from gorgons who should have died 3 times already. On his way to his destination Percy meets June, who happens to be Juno in disguise. Once he arrives at the tunnel leading to his destination (Camp Jupiter, but Percy doesn’t know that yet) he meets Hazel and Frank who fight off the gorgons while he goes to safety. After that Juno introduces Percy to the rest of Camp Jupiter and then teleports away. Then Reyna, a praetor, interrogates Percy in her office to make sure he isn’t an enemy and sends him to Octavian to see what the gods have to say. The gods approve and at dinner he gets assigned to the fifth cohort, the worst cohort. After dinner there were war games and thanks to Percy the fifth cohort beat the first and second cohorts (first and second cohorts are the best). Right after the games ended, Gwen gets killed but comes back to life because to doors of death were open. Then Mars comes issues the quest and claims Frank as his son. The next day after the senate debate the trio sets out on their quest. Once they reach the Roman Navy, which is I small steel row boat with no oars, Percy cleans it up and then starts toward Seattle. A little while later Hazel has a blackout and then the gang makes a temporary camp on a hill. Suddenly Hazel gets abducted by grain spirits working for Gaea but with the help of Percy and Frank she fights free. Then the trio sees Polybotes’s army attacking a rainbow store, but the army fails. After the army passes Percy, Frank and Hazel go to the store where Iris the goddess tells them that a seer in Portland might be able to help them. They find the seer named Phineas in Portland and then get the information. They got the information by gambling and Phineas lost so they found out that Alcyoneus’s lair is on the Hubbard Glacier and they made a new friend named Ella who is a harpy. On their way to Alaska they have to stop in Seattle because they boat broke down and sunk and the needed to talk to Reyna’s sister, Hylla. They find Hylla in the back of an Amazon building because it turns out she is actually queen of the Amazons. She sends the boys to prison while Hazel pleads their case. Queen Hylla understand except cannot free them because she would look weak but helps the trio “escape”. They escape on Arion, who is the fastest horse in the world being a god, who takes them to Vancouver, Canada. In Vancouver they spend the night Frank’s grandmother’s mansion. In the morning Grandmother sacrifices herself so that the trio can escape to a nearby airfield where a family friend flies them to Alaska. In Alaska they take the late night train to Seward but are attacked buy griffons. After the trio escapes the griffons they reach Hubbard Glacier with the help of Arion. At the crossroads the battle begins and finally Frank frees Thanatos who then keeps monsters and spirits killed dead. After Frank frees death (Thanatos), Frank helps Hazel kill Alcyoneus while Percy drowns the shades/spirits. Then the trio hefts out all the Imperials Gold weapons and puts them in the chariot so that Arion can takes back to San Francisco. After four hours the trio reaches Camp Jupiter where they help fight the monsters and Percy kills Polybotes, the giant, with the help of Terminus. After the battle Percy becomes the second praetor and the whole camp proceeds to the Feast of Fortuna. The next day the senators and praetors have a senate session about whether to allow the Greeks to land safely. Suddenly the Greek warship appears and the senate chooses to not attack. The book ends with Percy walking with Frank and Hazel.