Of Dragonets, Elves, Wars, and the Black Swan

Before Clearsight trapped him, Darkstalker had enchanted an egg to hatch on the brightest night and to be his and Clearsight's dragonet. When Clearnight got trapped in the world of Keeper of the Lost Cities, EVERYONE thought she was an elf, because she'd turned into a scavenger to explore the scavenger dens that were so unlike the ones in her world. Then she stumbles on a "museum", whatever the scavengers called it and a teal-eyed scavenger takes her and another scavenger to a new world where the 'elves' insist she's 'one of them'. How can she get back to her own world? How did she get stuck in this mess in the first place?