Moving from basic to more advanced topics, this popular core text has been revised and expanded to reflect recent advances. While giving readers the tools needed to understand and work with random processes, it places greater focus on thermodynamics, especially the kinetics of phase transitions. The chapter on Bose-Einstein condensation has been revised to reflect improvements in the field. The edition also covers stochastic processes in greater depth, with a more detailed treatment of the Langevin equation. It provides new exercises and a complete solutions manual for qualifying instructors.