Ashes
(Book)

Together, Harper and Knox have overcome just about every evil thing you can think of, from Horsemen of the Apocalypse to dark magic practitioners to Lucifer's insistent belief that he's hilarious. They're looking forward to some well-earned downtime, until Harper is attacked by mercenaries in the middle of her tattoo shop. Worse still, the attackers are trying to take her wings, the ones no one is meant to know she even has. It's a near miss and once a furious Knox has managed to pull his demon back into line there's only one thing clear, someone knows Harper's secrets and is systematically setting out to destroy her.