Queen of the Masquerade (Hallowmere #5)

the long version

Christina wakes in a new world with no memory of who she is or where she came from. Tasked with solving a riddle that will save the duke and duchess who rescue her and take her in as a changeling, Christina seeks to puzzle out just what she's doing here and why her memory has fled. But the riddle isn't just a key to saving the duke and duchess--it's Christina's key to something far more dire, a mission she knows she must remember, one that involves the strange young man who keeps appearing in odd places. Is the riddle a prophecy or a warning? Acclaimed YA author Amanda M. Jenkins, in partnership with Tiffany Trent, takes on Christina's voice to determine just how much Christina's fate depends upon the answer to that question.