The book is written in an easy style and should be readable by undergraduates in physics, theoretical physics, mathematics, and computer science and engineering. * Peter Richmond, Trinity College, Dublin * This is a very important and timely book... I would recommend this book to anyone hoping to learn the key concepts of complex networks science. * Mark Buchanan, Science Writer, Cambridge, UK * The context and exposition make this a useful textbook for beginners, as well as a reference book for experts in a variety of disciplines * CERN Courier *