I think my experience of this book was impacted by listening to it on audio - there was nothing wrong with the narration, but it was long and I found it hard to really be engrossed, hence it taking me months and months to get through. Learned a lot about the structure of the airforce/NASA interactions at the time of the development of the space shuttle program, and some of the key figures involved. Worth the time, but would read the physical book over the audiobook - I struggle with audiobooks in general though, typically preferring podcasts.