The fourth book in the bestselling Percy Jackson and the Olympians series. Now with a new cover look! Discover the story behind the Disney+ series.

HALF BOY - HALF GOD - ALL HERO.

SURE, AS A DEMIGOD I'VE HAD MY FAIR SHARE OF NEAR-DEATH DISASTERS. BUT HEY, I'M STILL HERE TO TELL THE TALE . . .

Percy Jackson's enemies are back, and looking for a way to destroy Camp Half-Blood.

To stop them, Percy and his friends must take on a new quest through the mysterious labyrinth – a sprawling underground world with deadly surprises at every turn.

But the labyrinth was built to keep heroes out, and secrets safe within.

As time runs out and the Titans draws near, can Percy save the day once more?

Praise for Rick Riordan:

'Vastly entertaining' Independent
'The stuff of legends' Guardian

Other books and series by Rick Riordan:

Percy Jackson and The Olympians

Percy Jackson and the Lightning Thief (Book 1)
Percy Jackson and the Sea of Monsters (Book 2)
Percy Jackson and the Titan's Curse (Book 3)
Percy Jackson and the Last Olympian (Book 5)
Percy Jackson and the Olympians: The Chalice of the Gods (book 6)
Percy Jackson and the Olympians: Wrath of the Triple Goddess (book 7)

The Kane Chronicles series
The Trials of Apollo series
The Heroes of Olympus series
The Camp Half-Blood series
The Magnus Chase 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.