Silver Fury (Harlequin Historical, 105) Paperback – November 1, 1991 by Isabel Whitfield (Author)
She never would have done it if she hadn't been desperate. Shelly York needed money to go East, and spying on a man suspected of stealing silver wasn't the worst thing she could do, she kept telling herself. Then Dillon Ryder caught her in the act, and Shelly knew too late that she'd made a terrible mistake. — The thriving mine meant the world to Dillon. He'd made good without any help from his tycoon father. So when he discovered the comely Miss York's treachery, he swore he'd get the whole truth out of her even if he undid himself in the process!