The Gangs of New York: An Informal History of the Underworld is a book by Herbert Asbury, American journalist and writer best known for his books detailing crime during the 19th and early-20th centuries. The Gangs of New York details the rise and fall of 19th century gangs in New York City, prior to the domination of the Italian-American Mafia during Prohibition in the 1920s. Focusing on the saloon halls, gambling dens, and winding alleys of the Bowery and the Five Points district of Lower Manhattan, the book evokes the destitution and violence of a turbulent era, when colorfully named criminals like "Dandy" Johnny Dolan, William Poole (also known as Bill the Butcher), and Hell-Cat Maggie lurked in the shadows, and infamous gangs including the Plug Uglies, Dead Rabbits, and Bowery Boys ruled the streets. It includes a rogues' gallery of prostitutes, pimps, poisoners, pickpockets, murderers, and thieves. The book contains detailed accounts of the New York City draft riots in 1863. It also elaborates on numerous other criminal influences of the time, including river pirates and the corrupt political establishment such as Tammany Hall.