The brothers were born in Ohio, a typical part of the United States. They did not have special education and had no investments. Yet, they were hardworking, austere, and detail-oriented. They had a supportive family, where curiosity and the “fix it” mindset were encouraged. They were ordinary people and they showed that ordinary people can accomplish extraordinary things.
McCullough is an excellent writer. He turns history into an interesting story and gives sufficient detail without getting boring.
This book is not only interesting for its insights into the history of aviation and progress, but also because it provides advice on product development. Cheap prototypes and quick iterations — it's all there.