Neiti Etsivä ja kolmastoista helmi

Blurb

The Thirteenth Pearl is the fifty-sixth volume in the Nancy Drew Mystery Stories series. It was first published in 1979 under the pseudonym Carolyn Keene. The actual author was ghostwriter Harriet Stratemeyer Adams. Although other volumes follow this one, "The Thirteenth Pearl" is the end of the original 56-book series published by Grosset & Dunlap.