Chaos: Charles Manson, the CIA, and the Secret History of the Sixties

Twenty years of reporting compressed into one 500-page investigation. Journalist Tom O'Neill set out to write a magazine piece about the Manson murders for the 30th anniversary, got pulled into the gap between the official narrative and the case files, and never came back. The book argues that the prosecutor's Helter Skelter theory did not match the evidence, and that the question of why Manson's parole officer kept letting him violate his release terms is one the FBI files never quite answer. Reads like a thriller because the source material is genuinely strange.