Audrey's Door by Sarah Langan (2009)

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Excellent haunted house story set on the Upper West Side of New York City. It's a hidden gem--a quality trade paperback hidden in the pages of a mass market paperback.  Good, complex characterization (the ex-fiance and shrewish boss are not painted as black and white bad guys), as well as an unusual, complicated backstory (chaotic naturalism!) and many scenes that just cry out to be filmed.  This is a great fit for fans of the contemporary gothic of Gillian Flynn.