Sphinx by Robin Cook

It was the magic and mystery of an empire long past that beautiful Erica Baron came to explore. Innocently she cast her eyes in forbidden places and discovered the clue to a treasure beyond imagination. It was then that terror overtook her, as the most fearful curse of the ancient world and the most savage menace of the modern one threatened to detroy her. One dangerously attractive man offered Erica help...he offered her protection...he offered her love. And in this strange, exotic land of seductive evils, where no one could be trusted, desire became for Erica the deadliest snare of all...