The Senior Year Adventures Books in Order

Percy Jackson and the Olympians: The Chalice of the Gods (2023)⁠^[5-8] introduces Percy Jackson’s senior-year goals: he hopes to graduate, attend New Rome University, and move toward a future with Annabeth Chase. However, his eligibility depends on obtaining three new letters of recommendation from the gods.⁠^[3]

The quest for Ganymede’s stolen chalice forms the opening test, while also establishing Annabeth and Grover as Percy’s principal companions in the series.⁠^[3]

Percy Jackson and the Olympians: Wrath of the Triple Goddess (2024)⁠^[9-12] continues the same senior-year framework, with Percy still working toward the three divine recommendations required for university admission. Hecate’s request moves the series into a Halloween setting and gives the trio another self-contained quest, this time centered on pet-sitting, magical animals, and mishandled magic.⁠^[13]

It builds on the continuing college-application premise established in book one.⁠^[13]