The Wild Road by Marjorie Liu

Those who look upon Lannes Hannelore see only an exceptionally handsome man. But his beauty is a prison, locking the dark truth inside his tormented soul. For Lannes is one of a dying race of remarkable creatures, hiding in plain sight among earth's human masters. His existence is solitary and sad—until the night he encounters a young woman on a deserted street, desperate, frightened, with no memory . . . and covered in blood.

She has no recollection of who she is or what she's done—and now she must trust a mysterious stranger whose imposing presence masks a gentle heart. Her need draws Lannes into a mystery that will cause him to confront his worst fears and question everything he believes—and compel him to risk his secrets for the one woman who might well be the love of his life . . . or the destruction of it. 

At first I wondered how this fitted into the Dirk and Steele series, but as the story went on it all fitted together. There were some appearances by characters from previous Dirk and Steele adventures. Very enjoyable read with some twists and turns and surprises.

It's a Gargoyle romance,  bit different from other paranormals.