The Hidden Staircase Book by Carolyn Keene

The Hidden Staircase is the second book in the Nancy Drew Mystery Stories series, written by Mildred Wirt Benson under the pseudonym Carolyn Keene. The book was published in 1930 and revised in 1959. The story involves a kidnapping and a supposedly haunted house. Nancy and her friends use their powers of deduction to solve the mystery.