Waiting On Wednesday: Deadly Curiosities by Gail Z. Martin

Cassidy Kincaide owns Trifles & Folly, an antique/curio store and high-end pawn shop in Charleston, South Carolina that is more than what it seems. Dangerous magical and supernatural items sometimes find their way into mortal hands or onto the market, and Cassidy is part of a shadowy Alliance of mortals and mages whose job it is to take those deadly curiosities out of circulation.