Visions of a Flying Machine by Jakab. About the Wright brothers. Basically emphasizes how they were consummate engineers, not scientists. In a field where there were not yet any textbooks, they zeroed in on what was necessary to build a practical airplane. They figured out each aspect (aerodynamics, controls etc.) to a satisfactory level, then moved onto the next without getting bogged down. They didn't fully understand the physics (they were by no measure aerodynamicists), but they knew enough to predict how their craft would do on paper, which is all engineers need.