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 . . .

Rick Riordan (he/him), dubbed 'storyteller of the gods' by Publishers Weekly, is the author of five #1 New York Times best-selling middle grade series with millions of copies sold throughout the world, including Percy Jackson and the Olympians, soon to be a live-action series on Disney+. His latest novel is Daughter of the Deep, a modern take on Jules Verne's 20,000 Leagues Under the Sea. Rick is also the publisher of an imprint at Disney-Hyperion, Rick Riordan Presents, dedicated to finding other authors of highly entertaining fiction based on world cultures and mythologies. He lives in Boston, Massachusetts with his wife and two sons. Follow him on Twitter at @RickRiordan.