The fourth book in Rick Riordan's The Trial of Apollo series. The bestselling top 10 hardback, now available in paperback! 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 . . .

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It's time to face the final trial . . . The battle for Camp Jupiter is over. New Rome is safe. Tarquin and his army of the undead have been defeated. Somehow Apollo has made it out alive, with a little bit of help from the Hunters of Artemis. But though the battle may have been won, the war is far from over. Now Apollo and Meg must get ready for the final - and, let's face it, probably fatal - adventure. They must face the last emperor, the terrifying Nero, and destroy him once and for all. Can Apollo find his godly form again? Will Meg be able to face up to her troubled past? Destiny awaits . . .