The House of Hades

The stakes have never been higher. If Percy Jackson and Annabeth fail in their quest, there'll be hell on Earth. Literally.<br /><br />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.<br /><br />Meanwhile, Hazel and the crew of the Argo II have a to stop a war or save their friends. Whichever road they take one thing is certain - in the Underworld, evil is inescapable.