Ingrid Newkirk founded PETA (People for the Ethical Treatment of Animals), the largest animal rights organization in the world, with affiliates in eight countries, in 1980. She is the author of Save the Animals! 101 Things You Can Do, Kids Can Save the Animals, The Compassionate Cook, and several other books available in multiple languages.

Gene Stone has written, cowritten, or ghost-written more than forty-five books on a wide variety of subjects, including the bestsellers Forks Over Knives, How Not to Die, Living the Farm Sanctuary Life, and The Engine 2 Diet.

Mayim Bialik, PhD, is perhaps best known for her lead role as Blossom Russo in the 1990s television sitcom Blossom, and she starred on the top-rated comedy The Big Bang Theory. Bialik earned a BS from UCLA in 2000 in neuroscience and Hebrew and Jewish studies, and a PhD in neuroscience from UCLA in 2007. She designed a neuroscience curriculum for homeschoolers in Southern California, where she also teaches middle and high school students. Married to her college sweetheart with two young sons, Bialik is also a Certified Lactation Education Counselor. Visit her at MayimBialik.net.