This collection of participant-observation studies of engineering design and product development, woven into a whole by the sociologist Dominique Vinck, presents the fruits of a decade-long collaboration between sociologists/anthropologists and mechanical engineers at Grenoble. Here we find designing 'in the raw' analyzed in a way which brings the social and the technical dimensions of engineering practice into coherence without slighting the former nor oversimplifying the latter. Its reading should be required of all students headed out into today's world where mastery of the mix of the two is what defines professional excellence. --Louis L. Bucciarelli, Jr., School of Engineering, MIT This collection presents multiple worlds of work in an accessible way that nonetheless emphasizes their complexity--a rarity in any academic writing, and especially difficult to achieve in ethnographic studies. Scott Taylor Prometheus