Don't Bid On Lot Thirteen. Nightlock Sins, #7

"Every collection begins with theft. You find something that belongs to the world and you decide it belongs to you..."Mireya Hart is the best provenance researcher in the art world. When an anonymous tip leads her to a highly exclusive, private auction in Nevada, she goes undercover to reclaim a stolen notebook containing her grandmother's life's work. But she soon realizes she's walked into an elaborate trap.
Evander Saint built Sacrament Hall to be the most impenetrable auction house in the country-a fortress designed to catch the kinds of forgeries that destroyed his father. But when a master forger breaches his defenses, Evander realizes he needs the one mind brilliant enough to catch them: Mireya's. He's spent twenty-six months studying her, reading her work, and building a cage she won't want to escape.
By making her the winner of a manufactured auction lot, Evander blackmails Mireya into a strict 30-day contract. She is locked inside his fortress, tasked with uncovering a three-generation dynasty of art thieves. But the deeper she digs into the forger's identity, the more she uncovers the terrifying depths of Evander's obsession. He's mapped her habits, memorized her preferences, and constructed a hidden lab just for her.
In a world where every masterpiece could be a beautiful lie, Mireya must decipher the truth before her time runs out. But Evander has already decided she's the one priceless object he will never deaccession.