PENNY NICHOLS AND THE MYSTERY OF THE LOST KEY is #2 in the Penny Nichols series of detective stories for girls.

Penny's generosity and unbounded friendliness earn her an instant friend in Rosanna Winters, a young lady in need of advice. Rosanna has inherited the property of her late uncle, Jacob Winters, and must inspect the estate at her earliest convenience. Penny suspects that Rosanna may be the victim of a hoax, but agrees to accompany Rosanna to the Winters home. Upon arrival the girls discover two additional claimants to the estate, each with a letter from Mr. Winters' lawyer! Most troubling, Rosanna's letter has disappeared, leaving her no claim...

Joan Clark was a pseudonym of Mildred A. Wirt Benson, (1905-2002) a prolific author of books for young readers. A trained journalist, Benson is best known as a ghostwriter for the Stratemeyer Syndicate. Under the house pen-name Carolyn Keene, Benson completed 23 of the first 25 Nancy Drew mysteries and wrote a number of others until 1984. Benson also wrote several of her own mystery series from the 1930s to the 1950s.

This unexpurgated edition contains the complete text, with minor errors and omissions corrected.