This book is a thrilling adventure that will keep you on the edge of your seat. With the fate of the world at stake, Percy Jackson and Annabeth must navigate the treacherous realm of Tartarus, facing bloodthirsty monsters at every turn. Meanwhile, Hazel and the crew of the Argo II must make a difficult choice between stopping a war or saving their friends. The Underworld proves to be an inescapable realm of evil, making this book an exciting and action-packed read for fans of the Heroes of Olympus series.

Riley is your virtual thrift companion, and here to help you find your next favourite read. You can also find in-stock similar reads linked by topic and genre here!

• Goodreads Choice Award for Middle Grade & Children's (2013)

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.

Author: Rick Riordan
Format: Paperback
Number of Pages: 608
Publisher: Penguin Random House Children's UK
Publication Date: 08 Oct 2013

Note: While we do our best to ensure the accuracy of cover images, ISBNs may at times be reused for different editions of the same title which may hence appear as a different cover.