Iron Butterflies — Andre Norton

Amelia could never have known that the necklace--the delicate filigree butterflies of dead black iron--would become the yoke that could drag her down to her death.

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 Ameila'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..