'As knowledge of placebo effects increases, Ho's timely new [ Element] has given us just what the doctor ordered: an insightful and graceful review of clinical and mechanistic research concerning placebo in the context a broad philosophical perspective that is enlightening. For anyone interested in placebo this volume is a critical read.' Ted Kaptchuk, Director, Harvard's Program in Placebo Studies and Professor of Medicine and Global Health and Social Medicine, Harvard Medical School