I love these kinds of obscure books because they are well researched and often provide answers to my random questions (like what car did Orville buy while Wilbur was sick? what is the story behind those photos of Scipio all tied up and incapacitated at Lambert Island?). These lesser-known books provide a more full and complete picture of their life before experiments and fame. This one was heavy on the bicycle business -how it evolved and grew- and it fills in a lot of little gaps that the mainstream biographies leave behind. Loved this one!