Twenty years ago, the American Academy of Pediatrics (AAP) and the American College of Emergency Physicians (ACEP) joined forces to develop the highly regarded Advanced Pediatric Life Support program, or APLS. The Fifth Edition of APLS: The Pediatric Emergency Medicine Resource represents a comprehensive body of knowledge in pediatric emergency medicine. APLS offers emergency physicians, pediatricians, nurses, paramedics, and other allied health professionals the advanced knowledge and skills necessary to assess and manage critically ill or injured children during the first hours in the emergency department or office-based setting. Developed by expert authors, editors, and faculty from both the AAP and ACEP, APLS is an inclusive teaching and learning system for healthcare providers. Each chapter is case based and covers the key elements of assessment, diagnosis, testing, treatment, and disposition. Beyond the 13 core textbook chapters, APLS also includes 12 supplemental chapters and educational modules at www.APLSonline.com, accessed with a code inside the book.