THE HIDDEN STAIRCASE

After receiving a call from her friend Helen Corning, Nancy agrees to help solve a baffling mystery. Helen's Aunt Rosemary has been living with her mother at the old family mansion, and they have noticed many strange things. They have heard music, thumps, and creaking noises at night, and seen eerie shadows on the walls. Could the house be haunted?

Just as soon as she hangs up the phone, a strange man visits Nancy's house to warn her and her father that they are in danger because of a case he is working on buying property for a railroad company. This warning leads Nancy and her father Carson to search for the missing Willie Wharton, a landowner, who can prove he signed away his land to the railroad and save the railroad from a lawsuit. Will Nancy be able to find the missing landowner and discover how these mysteries are related?

First published in 1930, The Nancy Drew Mystery Stories have sold over 70 million copies and become a cherished part of our cultural landscape. The teenage sleuth has been a noted inspiration for generations of women, including Sonia Sotomayor, Sandra Day O'Connor, and Hillary Clinton.
350,000 copies are sold each year. Last year in 2018, sales were up +21% from 2017, and sales have grown +30% in the last 5 years.

Carolyn Keene is a pen name used by a variety of authors for the classic Nancy Drew Mystery series. The first author to use the pseudonym was Mildred Wirt Benson, who wrote 23 of the original 30 books. Other writers who have adapted the "Carolyn Keene" moniker include Leslie McFarlane, James Duncan Lawrence, Walter Karig, and Nancy Axelrod.