Ranging gracefully over a vast intellectual terrain, Barabási shows how the exploding new area of
complex networks illuminates subjects as diverse as pure mathematics, phase transitions, the AIDS
epidemic, the human genome, cancer, the Internet, large corporate mergers, and international
financial crises. It is rare for a major player in the creation of new theory to present its deep math-
ematical insights in clear, nontechnical language. An intellectual treat.