"Version: 20190901"--Title page verso.Includes bibliographical references.1. Introduction -- 1.1. Basis properties and early observations of the Andromeda Galaxy -- 1.2. Modern M31 observations with digitized detector -- 1.3. Microlensing surveys and spin-offs -- 1.4. Wide-field camera view of M31 -- 1.5. Deep, multi-wavelength view of M312. Techniques for time-domain studies -- 2.1. Image subt…