At the heart of Shawn Vestal's debut novel "Daredevils," set in Arizona and Idaho in the mid-1970s, is fifteen-year-old Loretta, who slips out of her bedroom every evening to meet her so-called gentile boyfriend. Her strict Mormon fundamentalist parents catch her returning one night, and promptly marry her off to Dean Harder, a devout yet materialistic fundamentalist who already has a wife and a brood of kids.