The Trials of Apollo: The Hidden Oracle by Rick Riordan Disney-Hyperion, 2016 ISBN-13: 978-1484732748 Available: Hardcover, paperback, Kindle edition, Audible   The Hidden Oracle is the first book in a new series in the world of Percy Jackson and the Olympians, The Trials of Apollo. This book takes place six months after the war with Gaea and the giants’ […]