. . . . . . . . "Romance appears in several ways in the Percy Jackson and the Olympians, The Heroes of Olympus, and The Trials of Apollo series."@en . . . . . . . . . . . . . "Romance (CHB)"@en . . . . . . . . . "Romance appears in several ways in the Percy Jackson and the Olympians, The Heroes of Olympus, and The Trials of Apollo series."@en . . . .