Sacha Lamb

"Uriel the angel and Little Ash (short for Ashmedai) are the only two supernatural creatures in their shtetl (which is so tiny, it doesn't have a name other than Shetl). The angel and the demon have been studying together for centuries, but pogroms and the search for a new life have drawn all the young people from their village to America. When one of those young people, Essie, goes missing. Uriel and Little Ash set off to find her. Along the way...