image of Carolyn Keene

Carolyn Keene

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The Baby Sitter Burglaries (Nancy Drew)

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The Bungalow Mystery/the Mystery At Lilac Inn (Nanc …

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The Case of the Disappearing DeeJay (Nancy Drew)

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The CASE OF THE SAFECRACKERS SECRET (NANCY DREW 93) …

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THe Ghost of Craven Cove

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The Ghost of the Lantern Lady (Nancy Drew on Campus …

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The haunted lagoon (The Dana girls mystery stories …

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The Ice Cream Scoop (Nancy Drew Notebooks #6)

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The Mystery at the Crystal Palace (Nancy Drew 133)

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The Mystery of the 99 Steps

The Mystery of the 99 Steps is the forty-third volume in the Nancy Drew Mystery Stories series. It was first published in 1966 under the pseudonym Carolyn Keene. The actual author was ghostwriter Harriet Stratemeyer Adams.