Book excerpt: This issue of Clinics in Geriatric Medicine, guest edited by Dr. Susan Friedman, is devoted to Healthy Aging. Articles in this issue include: Healthy Aging Across the Stages of Old Age, How Geriatric Principles Inform Healthy Aging, Multimorbidity, Function and Cognition in Aging, Preserving Cognition, Preventing Dementia, Preserving Engagement, Nurturing Resilience, The Frailty Cycle: Reducing frailty to promote healthy aging, Addressing Obesity to Promote Healthy Aging, Lifestyle (Medicine) and Healthy Aging, Nutrition and Healthy Aging, Physical Activity and Healthy Aging, Mindfulness, Stress, and Aging, The Role of Prevention in Healthy Aging, Best Practices for Promoting Healthy Aging, Getting from Here to There: Motivational Interviewing and Other Techniques to Promote Healthy Aging, and more.