Changeling

Neef is a changeling, a human baby stolen by fairies and replaced with one of their own. She lives in "New York Between," a parallel Manhattan of elves, fairies, demons, and mythological spirits. Neef has always been protected by her (rat) nursemaid,Astris, until she winds up breaking Fairy Law. Now, unless she can meet the challenge of the Lady of Central Park, she'll be sacrificed to the bloodthirsty Wild Hunt. But Neef is a native New Yorker, streetwise and sharp, and she's determined to beat the rap.