In Tim Westover’s novel The Winter Sisters, the hills of antebellum northern Georgia are the setting for a clash between science and magic in a story that treads nimbly between fantasy, picaresque, and historical fiction. In 1822, Savannah doctor Aubrey Waycross is invited to Lawrenceville, a remote town that, thanks to Westover’s evocative prose, seems to exist in a perpetual time warp where America is still new and tradition coexists with progress—a community that is as distant from cities as it is from the ripples of the Revolutionary War and the brewing tensions of the Civil War.