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A thousand deadly monsters. Three battling demigods. One fatal decision.

The stakes have never been higher. If Percy Jackson and Annabeth fail in their quest, there'll be hell on Earth. Literally.
Wandering the deadly realm of Tartarus, every step leads them further into danger. And, if by some miracle they do make it to the Doors of Death, there's a legion of bloodthirsty monsters waiting for them.
Meanwhile, Hazel and the crew of the Argo II have a choice: to stop a war or save their friends. Whichever road they take one thing is certain - in the Underworld, evil is inescapable.
%%%The stakes have never been higher. If Percy Jackson and Annabeth fail in their quest, there'll be hell on Earth. Literally.



Wandering the deadly realm of Tartarus, every step leads them further into danger. And, if by some miracle they do make it to the Doors of Death, there's a legion of bloodthirsty monsters waiting for them.



Meanwhile, Hazel and the crew of the Argo II have a choice: to stop a war or save their friends. Whichever road they take one thing is certain - in the Underworld, evil is inescapable.

Formats & editions

  • Paperback

    9780141339207

    February 25, 2015

    Puffin

    624 pages

    RRP $21.00

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Also by Rick Riordan

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The Dark Prophecy (The Trials Of Apollo Book 2)
The Hidden Oracle: The Trials Of Apollo (Book 1)
Percy Jackson And The Sea Of Monsters (Book 2)
Magnus Chase And The Ship Of The Dead (Book 3)
Percy Jackson And The Titan's Curse (Book 3)
Magnus Chase and the Hammer of Thor: Magnus Chase (Book 2)
Percy Jackson And The Battle Of The Labyrinth (Book 4)
Magnus Chase And The Sword Of Summer (Book 1)
Percy Jackson And The Last Olympian (Book 5)
Son Of Neptune: Heroes Of Olympus (Book 2)
The Lost Hero: Heroes Of Olympus (Book 1)
The Blood Of Olympus (Heroes Of Olympus Book 5)
The Mark of Athena: Heroes Of Olympus (Book 3)
The Red Pyramid: The Kane Chronicles (Book 1)
Percy Jackson And The Greek Heroes
Percy Jackson And The Greek Gods
Camp Half-Blood Confidential
Percy Jackson And The Sea Of Monsters (Film Tie-In Edition)
Demigods And Magicians: Three Stories From The World Of Percy Jackson And The Kane Chronicles
The Serpent's Shadow: The Kane Chronicles (Book 3)
Heroes Of Olympus
The Son Of Neptune: The Graphic Novel (Heroes Of Olympus Book 2)

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