The Mark of the Rope — Miriam Lynch

Andrea Stanton hadn't planned on going to Fauncroft, the ancient Salem house where witches were once hanged. But when her neighbor, Charlene Metiver, suggested Andrea spend her vacation there, she accepted. Perhaps it would prove interesting, Andrea thought...

And interesting it was-- but not of the sort Andrea imagined. The dreary mansion was a living tomb of legends and curses, inhabited by fearful, suspicious people. When one of them saw a mark on Andrea's neck, they KNEW who she was... and cast her as the prize in a fiendish ritual of exorcism and Satanic evil!