Purity culture, which I’ve written about for Mother Jones over the past few years, is facing a growing challenge, as more and more women come forward to talk about how they’ve been harmed by the way evangelical communities emphasize sexual purity above all else. Enter Linda Kay Klein. Her debut book, Pure: Inside the Evangelical Movement That Shamed a Generation of Young Women and How I Broke Free, is part memoir, part collection of character vignettes, part deeply researched dive into the purity industry—the lucrative concerts, books, and rings that promote the ideology—and the religious mechanisms behind it.