Wetlands, by Charlotte Roche, has sold over 680,000 copies and is "the only German book to top Amazon.com's global best-seller list. With her jaunty dissection of the sex life and the private grooming habits of the novel's 18-year-old narrator, Ms. Roche has turned the previously unspeakable into the national conversation in Germany." How dirty is it? "It is difficult to overstate the raunchiness of the novel, and hard to describe in a family newspaper," says the NYT, rather prissily. Well, then! We'll just have to guess. Is it about dirtsex?