The fourth book in the breathtaking mythical series about gods and heroes, from the international bestselling author Rick Riordan.

Five ancient prophecies. One very grumpy ex-god.

Things are getting very bad, very fast, for Apollo . . .

The former God Apollo is having a pretty rough time of it. Well, for one thing, he's been turned into a human and banished from Olympus. And he's called Lester. But being an awkward mortal teenager is the least of his worries right now.

Though he and some of his friends have emerged from the Burning Maze, rescued the Oracle and lived to fight another day, they can't escape the tragedy that has befallen them, or the terrible trials still to face.

So, with heavy heart, Apollo (OK, Lester) and Meg have a triumvirate still to defeat, oracles to rescue, and prophecies to decipher, so that the world may be saved, and Lester may ascend into the heavens to become Apollo once again.

But, right now, Caligula is sailing to San Francisco to deal with Camp Jupiter personally, and they have to get there first. Failure would mean its destruction . . .

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

Other books and series by Rick Riordan:

The Trials of Apollo series

The Hidden Oracle (The Trials of Apollo Book 1)
The Dark Prophecy (The Trials of Apollo Book 2)
The Burning Maze (The Trials of Apollo Book 3)
The Tower of Nero (The Trials of Apollo Book 5)

The Percy Jackson series
The Heroes of Olympus 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.