Mystery of the Glowing Eye

Mystery of the Glowing Eye is the fifty-first volume in the Nancy Drew Mystery Stories series. It was first published in 1974 under the pseudonym Carolyn Keene. The actual author was ghostwriter Harriet Stratemeyer Adams.

Plot
When Ned Nickerson is kidnapped, Nancy knows it has something to do with the code name "Cyclops", but she has to work out the connection with the glowing eye-shaped stone in the museum. The plot involves advanced technology for the 1970s including a robot helicopter and a paralyzing ray.

Nancy is also troubled by a young lawyer's romantic intentions toward Carson Drew.