That sucks if true, although I don't expect everyone military special forcers operator to also be a great author on top of their other amazing skills, I expect it to be somewhat ghost written, but one hour? Perhaps the ghostwriter used other interviews and had access to other reports?
Oh I'm sure he read about it somewhere. But the book is simply fiction. Most of the story as Luttrell tells it to this day is false, but the book is even worse.