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After reading 1349 websites, we found 3 different results for "Who wrote The Hidden Staircase (Nancy Drew Mystery Stories, #2)"

Mildred Wirt Benson

Mildred Wirt Benson wrote Nancy Drew #2, The Hidden Staircase, in 1930.

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written by Carolyn Keene, a pseudonym

Nancy Drew and The Hidden Staircase is the second book in the Nancy Drew Mystery Stories series written by Carolyn Keene, a pseudonym.

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a 2019 American teen mystery comedy film directed by Katt Shea with a screenplay by Nina Fiore and John Herrera, based on the book of the same name by Carolyn Keene which was earlier adapted for a 1939 film

Nancy Drew and the Hidden Staircase is a 2019 American teen mystery comedy film directed by Katt Shea with a screenplay by Nina Fiore and John Herrera, based on the book of the same name by Carolyn Keene which was earlier adapted for a 1939 film.

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