Arranged in an A to Z format and cross-referenced, Encyclopedia of Violence by Margaret DiCanio, Ph.D. provides an overview. Entries include: violence management systems; health; law enforcement; judicial; and corrections. Strengths and flaws are revealed, particularly in juvenile and assembly-line justice. Explored are such seemingly unrelated types of crime as organized and corporate crime, both hidden from public view. Murder in various guises is described. While mass murders and serial murders by individuals capture public attention, more common are murders resulting from domestic abuse, barroom brawls, and petty squabbles. Classroom violence is covered, as is campus violence. Violence is expensive, economically, socially, and psychologically. Unlike many other nations, United States keeps relatively accurate crime statistics. Violence is not just a criminal justice problem; it is the world's major global public health problem, draining financial and human resources. Appendixes trace the roots of America's drug traffic, and provide resources.