The Lost Hero (Heroes of Olympus, Book 1) by Rick Riordan

“The Lost Hero” by Rick Riordan is the first book in the “Heroes of Olympus” series. It follows the story of three demigods: Jason Grace, Piper McLean, and Leo Valdez. Jason wakes up on a school bus with no memory of his past and discovers he is a demigod, the son of Jupiter. Along with Piper, who is the daughter of Aphrodite, and Leo, who is the son of Hephaestus, Jason must embark on a quest to save the world from a rising threat. The trio learns about their connection to the ancient Greek and Roman gods and must navigate their new identities while uncovering hidden truths and facing dangerous enemies.