What is the author's tone in the biography, The Wright Brothers?

David McCullough has written The Wright Brothers in an academic manner and in a historic framework. The detailed work that the Wright brothers accomplished over the span of their 10-year pursuit of the development of a flying machine is a tribute to their dedication and tenacity in the face of criticism, ridicule and failure. McCullough successfully inspires the reader not by words of praise and laudatory commentary. Their accomplishments speak for themselves and services as all the inspiration necessary.