Our treatment of animals is shocking, particularly what is done on factory farms, in research facilities and other entertainment venues such as Sea World and circuses. But times are changing and the tipping point is coming. More and more research is finding out that animals have a rich and full emotional life, they feel pain, and they don't want to die. This book is particularly affecting as it explores what it means to be human through the three main characters. Do you need a heart that beats to be 'human'? In Leon's case, no. He felt love and the whole range of human emotions. Kathryn looks like a wooly non-human animal, but is fully alive as a human being. Again and again, the author causes us to pause and reflect on our humanity and our relationship to other beings.