Heart of Stone (The Negotiator Trilogy, Book 1)

Alban Korund, a winged, shape-shifting gargoyle, is framed as a murderer. He begs legal help from Margrit Knight, a human lawyer who at first thinks he's your average Central Park stalker. Margrit soon becomes attracted to her stony client and fascinated by the shadowy world of the Old Races, who live secretly among humans.