Peter Singer made animal rights an international concern when he first published In Defence of Animals and Animal Liberation over thirty years ago. In this revised edition, he brings together new essays by philosophers and activists, chronicling new thoughts on animal suffering, reassessing the question of personhood, and highlighting tales of effective advocacy. In addition, he lays out 'Ten Tips for Activists', taking the reader beyond ethical theory and into the day-to-day campaigns for animal rights.

Peter Singer is Ira W. DeCamp Professor of Bioethics at the Center for Human Values, Princeton University. He is author of Animal Liberation, first published in 1975, and is widely credited with triggering the modern animal-rights movement. His Companion to Ethics is one of the most widely used texts in ethics, and Rethinking Life and Death received the 1995 National Book Council's Banjo Award for non-fiction. He was the foundation president of the International Association of Bioethics.