Under the Banner of Heaven: A Story of Violent Faith is a nonfiction book by author Jon Krakauer, first published in July 2003. He investigated and juxtaposed two histories: the origin and evolution of the Church of Jesus Christ of Latter-day Saints (LDS Church) and a modern double murder committed in the name of God by brothers Ron and Dan Lafferty, who subscribed to a fundamentalist version of Mormonism. The book was adapted as a limited series of the same name that began airing in April 2022 on FX on Hulu.