A surprise inheritance. A family of strangers. And a man she can't avoid . . . Cassidy Calhoun can't believe she's the secret daughter of an oil billionaire. This small-town Texas girl with student loans by the barrel has never gotten a thing she didn't earn for herself. The terms of her late father's will say Cassidy-and her newfound spoiled half-siblings-must work a year at the family's floundering business before they inherit a dime. Too bad the only thing Cass knows about oil is that it makes the junker she drives go. Mason MacKenzie, the evaluator for their test, will help her get up to speed. Or will he? Mason is a boot-wearing, truck-driving Houston hottie who runs Calhoun Petroleum's biggest rival. The sparks between him and Cassidy could combust any minute. But the closer they get, the more strange near-accidents Cassidy seems to be having. And Mason has plenty of reasons to play up their attraction for his own benefit. If she can trust him, the two of them working together might save a crumbling dynasty. But if she can't, Cass might just lose both her fortune and her heart . . .