NATIONAL BESTSELLER - During the Great War, a combat nurse searches for her brother, believed dead in the trenches despite eerie signs that suggest otherwise, in this hauntingly beautiful historical novel with a speculative twist, from the author of The Bear and the Nightingale. "A wonderful clash of fire and ice--a book you won't want to let go of."--Diana Gabaldon, author of Outlander "Spectacular--a tour de...