Traumatic brain injury (TBI) is a major public health problem with far-reaching effects for both injured individuals and their families, as Bob and Lee Woodruff attest in their moving narrative in the foreword to this textbook. This edition provides comprehensive coverage slanted toward neuropsychiatrists, neuropsychologists, and other mental health professionals. The chapters on neuropathology, genetics, structural and functional imaging, neuropsychiatric and neuropsychological assessment, and electrophysiology are outstanding. The book is not designed as a how-to guide for clinical treatment or prescribing information, reflecting the fact that current standards of TBI treatment, as understood by leading experts in this field, do not lend themselves well to simplified algorithms. Notably, the book does not cover the acute medical management of TBI in emergency settings, nor does it cover the management of persistent postconcussive symptoms in primary care, arguably the setting best suited to address many of these symptoms.