This is the first textbook that gives a thorough introduction to the graph-theoretical and systems-theoretical methods for networked dynamical systems. It includes * 82 examples and * 112 exercises with solutions.An accompanying booklet (ISBN 9789403648484) illustrates networked control by 12 application studies.The book starts with consensus and synchronisation as the classical problems of the field and continues with the communication structure design of networked controllers and with self-organised and event-triggered control, which are novel problems for which solutions have been elaborated recently. The second edition includes new material on the robustness of consensus systems and synchronised systems. The application studies have been extended and collected in a supplementary booklet.