I know the one that you're referring to, Willie. It's called The Foe of Barnabas Collins. Amy doesn't appear in this one, although she does show up as a minor character in some of the later books. It does feature the only appearance of Angelique, who tortures Barnabas by looking exactly the same as she did in Martinique. With olive skin and jet black hair. Perfect if your concept of Angelique is Anna Magnani. Josette also appears as a soft blue light. This is apparently before she found steady work promoting specials at Kmart.