All five books in the best-selling Trials of Apollo series are now available in a paperback boxed set complete with a bonus poster. "A clash of mythic intrigues and centuries of pop culture to thrill die-hard and new fans alike."-- Kirkus Reviews Rick Riordan's beloved Greek and Roman demigod characters from Percy Jackson and the Olympians and the Heroes of Olympus return in a five-book adventure quest with a fresh twist: they're helping Apollo regain...