If one were to look at Amazon's "Best Sellers in Mormonism" list on any given week, it is populated by books about Mormon fundamentalism. Jon Krakauer's Under the Banner of Heaven, a tale of the Lafferty brothers who killed an innocent woman and child in 1984, is usually in the top three spots, and memoirs by Ruth Wariner (The Sound of Gravel), Rebecca Musser (The Witness Wore Red), and Sam Brower (Prophet's Prey) are rarely far behind. Indeed, America's fascination with these marginalized polygamists transcends print, as HBO's Big Love and TLC's Sister Wives brought the more modern incarnation of these groups to the screen.