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Percy Jackson drives with Rachel Dare his girlfriend. He is approached by Charles Beckendorf, and the two leave to attack The Princess Andromeda.
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Charles Beckendorf sacrificed himself on the Andromeda to save Percy
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Percy and Annabeth go with Chiron to the oracle to find out the rest of the prophecy
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Percy heads to his fathers underwater kingdom of Atlantis to find they are inn war with the Titans and Percy cannot help.
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Percy goes into the underworld to take on the curse of Achilles after bathing in the river styx.
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As Percy emerges from the underworld, he calls upon the campers to defend Ney York City from the Titans while the gods are dealing with the monster Typhon.
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The campers struggle too hold back the attacks by the titans. Annabeth is badly injured when she saves Percy, and Percy refuses the surrender offer from Prometheus and the demi-god successfully defeat Hyperion
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Selena Beauregard disguises herself as Clarisse who becomes very angry after their boycott is ended and she kills the Drakon by herself
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Silena lies dying as her friends figure out that she was the camp spy but then righted her wrongs after her boyfriends death (Charles).
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the demi-gods are pushed back to the empire state building and Kronos is able to enter even with Hades and Nico's army.
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Percy, Annabeth, Ethan, And Luke work together to defeat Kronos and banish him to the void after Ethan revolts and gets killed and Luke gains control of himself again.
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The gods offer rewards for the demi-gods, and Zeus offers Percy immortality but he says no to be with Annabeth, and says instead he wants all demi-gods to be claimed by the time they are 13.
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Rachel offers to become the new oracle but Percy is still worried that Hades curse from the death of Nico's mother is still on the oracle.
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The demi-gods work together to rebuild camp half-blood, and all the fallen half-bloods will be honored with the End of Summer's Bead.
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Percy and Annabeth celebrate Percy's birthday together and make their love official and start dating.
