"THE WRIGHT BROTHERS" by Fred C. Kelly. This is the one I read and it turns out to be on project Gutenberg:

https://www.gutenberg.org/files/67672/67672-h/67672-h.htm

I'm really curious how that is considered public domain, it was published in 1943 and he died in 1959.

Anyway, one of the things most fascinating to me was their attempts to sell an airplane to the US army and other business related things. You'd think inventing the airplane would bring quick financial rewards but it was a long road.