"Version: 20220901"--Title page verso.Includes bibliographical references.1. Basic concepts of single networks -- 1.1. Introduction -- 1.2. Degree distribution--how networks are structured? -- 1.3. Percolation transition--how a network collapses? -- 1.4. Further network properties -- 1.5. Spatial networks2. From single networks to networks of networks -- 2.1. Introduction -- 2.2. How networks n…