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The Lost Hero marks the exhilarating start of the Heroes of Olympus series, introducing new demigods Jason Grace, Piper McLean, and Leo Valdez. As they grapple with their newfound powers and forgotten pasts, these heroes embark on a perilous quest to prevent a catastrophic war between the gods and an ancient, awakened evil, all set within the beloved Percy Jackson universe.

The Lost Hero by Rick Riordan is the captivating first installment in the Heroes of Olympus series, introducing readers to Jason, Piper, and Leo, three new demigods thrust into a world of ancient prophecies and mythological creatures. This epic young adult fantasy adventure seamlessly blends Greek and Roman mythology, expanding the beloved Percy Jackson universe with a thrilling new quest to find a missing hero and prevent a looming war.