A beautifully illustrated guide to grey wolves from wolf expert Brenna J. Cassidy. You might know that grey wolves live in packs, but there's so much more to learn about these incredible predators! Find out what makes wolves howl, why wolves sniffing each other's butts is their way of shaking hands, and how some wolves in Yellowstone National Park used thermal activity to heat their den! You'll also witness the incredible relationship grey wolves have with ravens (they play tug with wolf cubs), learn about wolf rewilding projects, and discover what it takes to become a wolf zoologist yourself.