Don’t be worry [(PDF)] The Trials of Apollo, Book One: The Hidden Oracle can bring any time you are and not make your tote space or bookshelves’ grow to be full because you can have it . Displaying 1. The Hidden Read the first chapter of The Hidden Oracle, the first book in the Trials of Apollo series by Rick Riordan. Follow the adventures of Apollo, the former god of poetry, who is punished by Zeus .