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The fourth book in the bestselling Heroes of Olympus series - set in the explosive world of Percy Jackson.
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.
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The fourth book in the bestselling Heroes of Olympus series - set in the explosive world of Percy Jackson.
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.
Rick Riordan is the #1 New York Times bestselling author of the Percy Jackson and the Olympians series, as well as The Kane Chronicles, Magnus Chase and the Gods of Asgard, The Heroes of Olympus, and The Trials of Apollo.