The Hidden Oracle (The Trials of Apollo Book 1)

How do you punish an immortal? By making him human. After angering his father Zeus the god Apollo is cast down from Olympus. Weak and disoriented he lands in New York City as a regular teenage boy. Now without his godly powers the 4000-year-old deity must learn to survive in the modern world until he can somehow find a way to regain Zeus' favor. But Apollo has many enemies - gods monsters and mortals who would love to see the former Olympian permanently destroyed. Apollo needs help and he can think of only one place to go...an enclave of modern demigods known as Camp Half-Blood.