(From the publisher):
A visit by a sinister fellow who claims Carson Drew swindled him out of land that was condemned for the railroad leaves Nancy shaken as the man threatens harm if he does not get his money back. Meanwhile, mysterious goings on and thefts of personal items at the home of the Turnbull sisters leads Nancy to try and catch the house "ghost." Someone is trying to get the Turnbull sisters to leave The Mansion! Carson Drew's disappearance and a series of events that put Nancy in danger as she discovers a hidden staircase and secret passageway lead to the resolution of this spooky and suspenseful mystery.
Original title: The Hidden Staircase
Genre: Fiction→ Children & Young Adult→ Mystery