Ten Days in a Mad-House: The Original 1887 Edition (Nellie Bly's Experience on Blackwell's Island)

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 (now called Roosevelt Island).

The book received acclaim from critics at the time. The combination of her reportage and the release of her content brought her fame and led to a grand jury investigation and financial increase in the Department of Public Charities and Corrections.