Ingrid Newkirk has spent her career advocating against animal cruelty. The president of PETA and coauthor Gene Stone are out with a new book, Animalkind: Remarkable Discoveries About Animals and Revolutionary New Ways to Show Them Compassion. An inspection of the inner lives of animals (“Animals love,” they write. “They grieve. They feel emotional pain. They worry. And they can anticipate pain”), the text offers compelling arguments against animal testing and circuses and in favor of veganism and low-oil diets. They make less compelling arguments against leather, but you still may want to avoid wearing Birkenstocks to their reading. by Katie Herzog