This volume gives an account of modern knowledge of Regge Theory and QCD, an active area of high-energy particle-physics research. It records what has been learned in the past, what is relevant now, and what is essential for the future. The authors cover forty years of research and provide unique insight into the theory and its phenomenological development. The phenomenology is applied to a variety of reactions and is compared extensively with experiment. This is essential reading for particle physicists and is suitable as a graduate textbook.