The aim of this book is to introduce the reader to research work on a particular aspect of rotating fields in general relativity‎.‎ The account begins with a short introduction to the relevant aspects of general relativity‎,‎ written at a level accessible to a beginning graduate student in theoretical physics‎.‎ There follows a detailed derivation of the Wehl‎-Lewis‎-Papapetrou form of the stationary axially symmetric metric‎.‎ The Kerr and Tomimatsu‎-Sato forms of the rotating interior and exterior solutions of the Einstein equations are then discussed‎.‎ The last three chapters of the book illustrate the applications of the theory to rotating neutral dust‎,‎ rotating Einstein‎-Maxwell fields‎,‎ and rotating charged dust‎.‎ The author has drawn on his own research work to produce a timely discussion of this important area of research‎.‎