John Maloof is an author and street photographer involved in the historic preservation of Chicago's Northwest Side. He discovered the first negatives of Vivian Maier's work in 2007 while compiling a book about the history of the neighborhood where he grew up. He edited the first and second published collections of Maier's work, Vivian Maier: Street Photographer and Vivian Maier: Self-Portraits. He lives in Chicago.