a painting of a young man in the water

"The Hidden Oracle" is the first book in the "Trials of Apollo" series by Rick Riordan. It follows the god Apollo, who has been cast down from Olympus by Zeus and transformed into a mortal teenager named Lester Papadopoulos. With the help of his demigod friends, including Percy Jackson, Apollo embarks on a quest to restore his godhood by completing a series of trials. Along the way, he faces enemies both old and new, navigates the challenges of mortality, and learns important lessons about friendship, sacrifice, and redemption. The book is filled with Riordan's signature blend of humor, action, and mythology, making it an entertaining read for fans of all ages.