Book excerpt: Pocket Emergency Medicine, Fourth Edition, provides accurate, actionable, and easily accessible information for clinicians on the front lines of emergency care. Designed to be used at the bedside, it’s an outstanding go-to source for the essential information you need to care for patients in life-threatening situations. This volume in the popular Pocket Notebook series provides a concise and focused review of the entire field of emergency medicine — from history and physical exam to differential diagnosis testing to therapeutics to disposition – all in one easy-to-navigate looseleaf notebook.