Complex networks are ubiquitous in our lives.Representative examples are the Internet, social networks, biological networks,E-commerce networks, electrical power grids, and larger-scale engineering systems.It is well known that the Internet has been a powerful engine for our societal evolution and technological innovation.Nowadays, network science and engineering faces fundamental challenges, such as understanding the complexity of various large-scale networks, developing new architectures and exploiting new substrates, and enabling new applications and new economics.To a better future, the complex networks in our lives will need to be better: more accessible, more reliable, more predictable, and more secure.