Hi Nicholas, no comment re authenticity - not my area here. Are those scratches and/or abrasions at the top of the cover (particularly above "empty sky") and to the right and left of the name/title? At last there is no sticker (is there?) :) well, there is a sticker but the kind that is acceptable (to me anyway)! Be sure to get opinions on authenticity.
As he is rather plentiful, I would suggest avoiding the abrasions and also, to me, look how the first stroke is lost in the building there. I recall trying to describe such a thing to you. Not quite optimum contrast - I'd wait for another, were it my collection.
I just realized I did not mention I found those scratches or wear using Photoshop. It doesn't really show here. You must be wondering what I am talking about. I will try to make an image for you. I tried this because that photo looked dark to me.