OverviewStatistical physics and thermodynamics describe the behaviour of systems on the macroscopic scale. Their methods are applicable to a wide range of phenomena, from neutron stars to heat engines, or from chemical reactions to phase transitions. The pertinent laws are among the most universal ones of all laws of physics. Yet to many, this subject appears as merely a collection of ad hoc recipes, and its essential concepts remain elusive. To help readers overcome these difficulties, this text provides a concise yet thorough introduction to the key concepts underlying statistical physics and thermodynamics. This clear exposition of concepts is complemented by a wealth of applications and classroom-tested exercises, covering all major topics of a standard one-semester course.