The Secret Heiress — Judith Gould

Separated at birth by a tyrannical father and reared continents apart, Nikki and Ariadne are twins with only their beauty in common. Nikki, raised in luxury by the mad tycoon, is heiress to his empire. Living in obscurity, brilliant Ariadne is unaware of her bloodline until she's given an opportunity to reclaim her share of the family fortune. Seduced into a deadly masquerade, she finds her only protection in the arms of a bodyguard. But in the mysterious shadows of this privileged new world, can she really trust the passion of a stranger?