All five books in the Trials of Apollo series in a hardcover boxed set of heroic proportions. Favorite Greek and Roman demigods return in a five-book adventure quest with a fresh twist: they’re helping Apollo regain his immortal status. "A clash of mythic intrigues and centuries of pop culture to thrill die-hard and new fans alike."— Kirkus Reviews From The Hidden Oracle to the long awaited The Tower of Nero, this collection will thrill loyal readers and be a go-to gift for new fans of the bestselling series.