Ten Days in a Mad-House is a book by American journalist Nellie Bly. It was initially published as a series of articles for the New York World; Bly later compiled the articles into a book, being published by Ian L. Munro in New York City in 1887.The book was based on articles written while Bly was on an undercover assignment for the New York World, feigning insanity at a women's boarding house, so as to be involuntarily committed to an insane asylum. She then investigated the reports of brutality and neglect at the Women's Lunatic Asylum on Blackwell's Island.