After years of saving the world, Percy Jackson wants only a normal senior year of high school and a future with his girlfriend Annabeth Chase at New Rome University, the demigod-friendly college in California. There is a catch: admission requires three letters of recommendation from the gods, and the Olympians rarely do favors for free. Percy's sea-nymph guidance counselor, Eudora, connects him to his first opportunity. Ganymede, Zeus's beloved cupbearer, has lost his magical chalice, a goblet so powerful that any mortal who drinks from it becomes immortal. If Percy can recover it before Zeus's next feast, Ganymede will write the crucial first letter. With Annabeth and his satyr best friend Grover Underwood at his side, Percy chases leads across New York, navigating petty gods, old rivalries among former cupbearers, and a thief with a surprisingly philosophical motive. Lower-stakes and more character-driven than the world-ending plots of the original series, the book trades apocalyptic battles for a warmer, funnier story about friendship, growing up, and figuring out what comes after heroism. The first new Percy Jackson and the Olympians novel since The Last Olympian (2009), it reads as a nostalgic reunion with the trio fans grew up with, leaning into humor and slice-of-life demigod problems rather than prophecy and war. It opens The Senior Year Adventures, a trilogy following Percy's pursuit of his college recommendation letters.