"History buff absolutely recommends Killing Lincoln"
Yes and I have. For history fans it is seldom we get an accurate book that reads like a novel. There are some points of conjecture, rather than detract, they make the book better.
Not applicable, rather, the character development of the historical figures was extremely well done. I learned something about each of them I did not know before.
Whenever the author reads his/her own book they provide emphasis where they intended it; if you will, O'Reilly adds depth to the book.
You thought you knew John Wilkes Booth?
Audible should figure out how to make the pictures from texts and non-fiction available to its listeners.