"The Age of Diagnosis" by Dr. Suzanne O'Sullivan is a thought-provoking book that delves into the impact of medical labels on our health and well-being. Published by Penguin Publishing Group in 2025, this limited edition textbook explores the psychological, medical, and social aspects of diagnosis in contemporary society. Drawing on cognitive neuroscience, internal medicine, and anthropology, O'Sullivan challenges the conventional wisdom surrounding the role of labels in shaping our understanding of illness and wellness. With 286 pages of insightful analysis and commentary, this book is a valuable resource for adult learners and those interested in the intersection of psychology, medicine, and culture.