"Catherine Haustein’s love of science imbues every page of this fascinating novel. Be prepared to learn as well as be entertained. The heroine Clementine is a frustrated naturalist longing to make a great scientific discovery. A special potion enables her to transform into a man so that she can serve as a naturalist on a prospecting expedition in 1871. Haustein packs her book with mid-nineteenth century happenings and curiosities: gold-rush era prospectors, madams, cowboys, traveling road show performers, and her native mid-western Dutch culture. Woven into the romantic plot between Clementine/Calvin and her star-crossed lover, Wesley, Haustein weaves reflections on Darwin and religion, the relationship between plant, animal, and human life, and the struggles of women in science. ***** readers will like her fluid view of mid-nineteenth century sexuality. A smart, lively read."