Marcia, the Innocent — Katheryn Kimbrough

Lovely young Marcia Wing felt as if she had been rescued from infernal darkness to emerge into heavenly light when she was adopted by the Phenwicks. The splendor of Merrihew Manor, the glowing kindness and dazzling beauty of her foster mother, Susannah Phenwick, all seemed a world removed from the horrible squalor and base passions that had surrounded Marcia and her younger brother as helpless orphans.

Little did Marcia suspect that in her new home and among her new family lurked greater dangers than she had ever known. The ghost of her own past joined forces with the phantom spectre that haunted the Phenwick clan to fill her with nightmare terror. Evil hungered for her body and soul, and Marcia, the Innocent, had no ally as she fought the strength of her satanic adversary and the weakness within her own self to survive and to triumph as the most cruelly imperiled and indomitably courageous of all the Phenwick women....