Raul was first to notice a cover image for U2, A Diary on Amazon:
I checked with Chris at Omnibus (my editor) to see if this is the cover, and the answer, in one word is:
There’s a big publishing industry trade show coming up in London and this is the cover they’re using for the promotional material that will be displayed there. There’s a chance it’ll be the final cover image, too. But also a chance it’ll change.
So, there you have it. Nice find, Raul.