The 21st edition of A Textbook for Today's Chief Medical Resident is a vital reference for new chief residents-for internal medicine and beyond. Providing advice on the multiple roles of a chief resident-administrator, educator, mentor, and counselor-this edition features chapters on: The Chief Medical Resident and Duty Hour Requirements The Challenges of Medical Professionalism in the Digital Age Bumps in the Road: Maintaining Momentum and Preventing Burnout in Your Chief Year Teaching Clinical Reasoning: A Systematic, Case-Based Approach Mentoring Residents through the Subspecialty Fellowship Application Process