Treading carefully near a sandhill crane's nest, testing the ice on the river, and marveling at the seasonal influx of ducks, this pair of curious naturalists takes us into the intimate corners of western Montana, inquiring into all natural phenomena--which Hannah then captures on the page in detailed sketches, notes, and watercolors. If Annie Dillard were an artist, she might have composed a book like this. But few writers, or artists, can bring...