Harriet and ProfessorVan Dusen come face to face with the fiery phantom that's been haunting the lonely house on the hill. A fifty-year-old puzzle is solved and missing diamonds recovered in the conclusion of this classic Thinking Machine mystery.
Harriet and ProfessorVan Dusen come face to face with the fiery phantom that's been haunting the lonely house on the hill. A fifty-year-old puzzle is solved and missing diamonds recovered in the conclusion of this classic Thinking Machine mystery.