Doppelgangster [Dramatized Adaptation]: Esther Diamond, Book 2

A struggling actress, a 350-year-old mage whose day job is protecting New York City from Evil, a skeptical cop - and double the number of wiseguys that there should be....While working as a singing waitress in Little Italy, struggling actress Esther Diamond witnesses a mob hit.

And right before getting whacked out, the victim tells her that he just saw his own doppio - a perfect double and a notorious portent of death.