Helter Skelter: The True Story of The Manson Murders is a 1974 book by Vincent Bugliosi and Curt Gentry. Bugliosi had served as the prosecutor in the 1970 trial of Charles Manson. The book presents his firsthand account of the cases of Manson, Susan Atkins, Patricia Krenwinkel, and other members of the self-described Manson Family. It is the best-selling true crime book in history.

Vincent T. Bugliosi Jr. was an American prosecutor and author who served as Deputy District Attorney for the Los Angeles County District Attorney's Office between 1964 and 1972. He became best known for successfully prosecuting Charles Manson and other defendants accused of the Tate–LaBianca murders that took place between August 9 and August 10, 1969.