Iron Butterflies by A Norton

"Amelia Harrach lived with a name blackened by scandal. They said her grandmother's marriage to a captive Hessian officer during the American Revolution had been false. Moreover, they said Amelia's father was a bastard. Then came the news that her grandfather was indeed alive, and ready to acknowledge Amelia's legitimacy, and make her heiress to a great fortune in Germany. And so began a journey-a journey into horror and evil that would endanger Amelia and her fortune. Suddenly she was trapped in a world of drugs and nightmares. But the treacherous way to freedom lay ahead-and so did love..." -- (p.4) of cover.