This book details the physical concepts and theoretical approaches developed to study the dynamical properties of high-density fluids at the microscopic level. After an incisive discussion of basic dynamical phenomena and various experimental probes, the book introduces the sophisticated theoretical techniques necessary for obtaining an in-depth account of both single particle and collective motions. Potential complications are addressed in a stepwise fashion, with special attention paid to the physical contents of the results. Well-written and comprehensive, Dynamics of the Liquid State will be welcomed by students and researchers in condensed matter physics and physical chemistry.