The theory of switched systems is related to the study of hybrid systems, which has recently attracted considerable attention among control theorists, computer scientists, and practicing engineers. This book examines switched systems from a control-theoretic perspective, focusing on stability analysis and control synthesis of systems that combine continuous dynamics with switching events. The book is suitable as a text for a graduate course, and also may serve as an introduction to this active area of research for control theorists and mathematicians, as well as a useful reference for experts in the field.