Changeling — Delia Sherman

A determined heroine, a quest? adventure galore!
Neef is a changeling, a human baby stolen by fairies and replaced with one of their own. She lives in ?New York Between,? a Manhattan that exists side by side with our own, home to various creatures of folklore. Neef has always been protected by her fairy godmother?until she breaks a Fairy Law. Now, unless she can meet the challenge of the Green Lady of Central Park, she?ll be sacrificed! Neef is determined to beat the rap?but time is running out . . .