Beyond croaking, "Nevermore," what exactly do ravens do all day? Bernd Heinrich, biology professor at the University of Vermont and author of Ravens in Winter, has spent more than a decade learning the secrets of these giants of the crow family. He has observed startlingly complex activities among ravens, including strong pair-bonding, use of tools, elaborate vocal communication, and even play. Ravens are just plain smart, and we can see much of ourselves in their behavior. They seem to be affectionate, cranky, joyful, greedy, and competitive, just like us. And in Mind of the Raven, Heinrich makes no bones about attributing emotions and intellect to Corvus corax--just not the kind we humans can understand. He mostly catalogs their behaviors in the manner of a respectful anthropologist, although a few moments of proud papa show through when he describes the pet ravens he hand-raised to adulthood. Heinrich spends hundreds of loving hours feeding roadkill fragments to endlessly hungry raven chicks, and cold days in blinds watching wild ravens squabble and frolic. He is a passionate fan of his "wolf-birds," a name he gave them when he made the central discovery of the book: that ravens in Yellowstone National Park are dependent on wolves to kill for them. Mind of the Raven offers inspiring insight into both the lives of ravens and the mind of a truly gifted scientist. --Therese Littleton