The fourth book in the bestselling sequel series from Percy Jackson and the Olympians, featuring the original hero - now in a brand-new look!

Seven Heroes. One Prophecy. Destiny Calls.

Lost in the depths of the Underworld, Percy and Annabeth's lives rest in the hands of their friends and fellow demigods – Jason, Piper, Leo, Hazel and Frank.

Their five friends must reach the Doors of Death – gateway to the Underworld – if they ever want to see Percy and Annabeth again. But between them and the doors lies a vicious army hellbent on destroying Camp Half-Blood. . .and the whole world with it.

If the demigods can fight their way through– and Percy and Annabeth can survive hell itself – they might just have a chance.

If they don't. . .Well, it's only the whole world at stake.

Praise for Rick Riordan:
'Vastly entertaining' Independent
'The stuff of legends' Guardian

Other books and series by Rick Riordan:

The Heroes of Olympus series

The Lost Hero (Heroes of Olympus Book 1)
The Son of Neptune (Heroes of Olympus Book 2)
The Mark of Athena (Heroes of Olympus Book 3)
The Blood of Olympus (Heroes of Olympus Book 5)

The Trials of Apollo series
The Percy Jackson series
The Kane Chronicles series
The Magnus Chase Series
The Camp Half-Blood series

RICK RIORDAN(he/him), dubbed "storyteller of the gods" by Publishers Weekly, is the author of five New York Times number one bestselling series with millions of copies sold throughout the world. He is known for his Percy Jackson and the Olympians books, which bring Greek mythology to life for contemporary readers. The first book in the series, The Lightning Thief, has won numerous awards, and been adapted into a feature film, a graphic novel, a Broadway musical and an Emmy Award–winning live-action series on Disney+ that Rick cocreated and executive-produced. He lives in Boston, Massachusetts, with his wife and fellow executive producer, Becky.