Who are all those people filling the airplanes back and forth between Bangalore, Taipei, Shanghai, Tel Aviv and San José? According to AnnaLee Saxenian, they are a ‘new type of entrepreneur’, one who comes from one country, learns the complexities of the Silicon Valley system, builds up relationships with both fellow countrypersons and expatriate entrepreneurs from other countries, takes the knowledge back home, becomes a critical link in boosting the technology development capacities of the home region through transfer of knowledge and relationships, and sometimes continues living both in Silicon Valley and at home. These Argonauts become strategic agents in the contemporary spread of dynamic high technology clusters around the globe. Saxenian tells their stories in this remarkable new book. There is probably no more experienced and astute chronicler of the advent of the Silicon Valley ecosystem than AnnaLee Saxenian. She was the pioneer in doing detailed field work in Silicon Valley in the 1970s, documenting the Valley's particular organizational and developmental characteristics, well before it was recognized that this was the beginning of a new type of business organization and innovation system. Her earlier book, Regional Advantage, is a powerful statement of how this regional actor–network system works, and why Silicon Valley's system is so robust in the face of successive waves of technological change, offshoring and maturation of the world IT industries. She has done it again in The New Argonauts, providing us the first in-depth analysis of global high-tech entrepreneurs from China, India, Israel and Taiwan.