Biomechanics of Musculoskeletal Injury" is a second edition academic textbook that presents a structured and accessible introduction to the biomechanical principles underlying musculoskeletal injuries. The book explains how mechanical forces such as stress, strain, stiffness and elasticity influence biological tissues, and how these forces contribute to injury mechanisms and recovery processes. It integrates physiological, anatomical and mechanical perspectives to build a comprehensive framework for understanding injury in human movement systems. The text is organized into a theoretical foundation followed by applied anatomical regions. Early chapters develop core biomechanical principles, including tissue adaptation, load response and injury causation models. Later sections apply these principles to specific body regions such as the lower extremities, upper extremities, head, neck and trunk. Special attention is given to clinically relevant injury types and modern concerns such as ligament injuries, rotator cuff pathology and concussion mechanisms.