The document provides biographies of the authors Robert Sutton and Huggy Rao, who wrote the book "Scaling up Excellence". The book tackles the challenge of spreading exemplary performance from a few individuals to many as an organization grows. It explores principles for scaling such as engaging people at all levels, linking goals, accelerating accountability, and connecting diverse groups of people. The authors argue that scaling requires both adding and subtracting processes, and that bad behaviors can spread more rapidly than good ones.