Question: Who are the parents of the goddess the title of the final novel of the "Percy Jackson & the Olympians" series refers to?
Sentence (from "Camp Half-Blood chronicles"): Camp Half-Blood Chronicles is a media franchise created by author Rick Riordan, encompassing three five-part novel series, three short-story collections, two myth anthology books, a stand-alone short story, an essay collection, a guide, four graphic novels, two films, a video game, a musical, and other media.
Relevant evidence: No