Shadows — Jory Sherman

A desperate and wealthy toy manufacturer seeks out a clinic in Mexico as a last-resort cure for his terminal cancer. But the mansion he buys there is more insidious than his illness-shadowy apparitions stalk his every move. No sooner are Chill and Laura summoned, than a doll, possessed of a life of its own, begins to terrify them all, as it seeks revenge on a mysterious evil-an evil only the shadows know.