Like the first test-tube baby, like Roe v. Wade, like Dr. Kevorkian, Dolly the cloned sheep has opened up new dilemmas in ethics, biology, and medicine. Director for the Center of Bioethics at the University of Pennsylvania, Arthur Caplan has a talent for getting to the heart of such issues, teasing out the complexities, and forecasting the implications of ethical positions. Skirting the mire of polemics, Caplan comes back time and again to the notion of trust and need to work through ethical dilemmas as a group. Broad in its scope and technical at times in its depth, Am I My Brothers Keeper? is an insightful, up-to-date exploration of our most daunting ethical conundrums.