"Reader is distracting"
I found myself fixated on the reader's pronounciation rather than the book itself. Think Pontius Pilate/Michael Palin from the movie "Life of Brian", because I do whenever I listen to it.
Perhaps the choice of reader was intentional.
"American Civil War from a British point of view"
Another winner by preeminent historian Keegan. The reader's English accent and odd pronunciations of names, such as 'Potomac', emphasizes that this is intended to be an impartial evaluation of the American Civil War. I really like how the writer describes English roots of some parts of the Civil War military tradition.