The Hidden Staircase by Carolyn Keene
A mysterious ghost haunts two residents of an old estate in Cliffwood. Women are intimidated and are even ready to sell their house for next to nothing just to get rid of this problem. But things take a new turn when Nancy appears in the house. The girl detective and her friend Helen will have to come face to face with the ghost, and at the same time help her father in the complicated case of the railway company.
Table of Content
Chapter 2 The Mysterious Mishap
Chapter 5 A Puzzling Interview
Chapter 17 Through the Trap Door