Provisional profiles nine of the United States' most exciting architectural practices. They all share a pragmatic, "roll-up-your-sleeves" approach that seeks opportunities to redefine the role of craft in architectural practice. Enlightening interviews together with a selection of drawings, diagrams, models, renderings, and building process photographs reveal a shared commitment to experimentation and learning-by-doing. Projects by SHoP Architects, Front Studio, Gehry Technologies, Lewis.Tsurumaki. Lewis, Hweler + Yoon Architecture, nARCHITECTS, servo, GYA Architects, and Chris Hoxie Design are included as well as the following projects: Beijing National Stadium, China Central Television (CCTV) Station and Headquarters (Beijing), Dee and Charles Wyly Theater (Dallas); FutureGen Power Plant (Illinois); Highline HL23 (New York City); and the Olympic Sculpture Park (Seattle).