I'm posting this information only because there seems to be some confusion regarding the mosiac for the dust jacket on the UK edition. While I can no longer access the Facebook Ap that was set up for submissions and had the "fine print" included, I did find this information archived in the ever-useful resources at
Lilja's Library.
To celebrate the publication of The Wind through the Keyhole, the hotly anticipated new episode in Stephen King’s fantasy series The Dark Tower, we’re inviting you to help make literary history; lucky entrants will have their faces featured on the back of the jacket artwork.
Using mosaic design technologies, thousands of readers’ images will be incorporated in the illustration on the back cover of The Wind through the Keyhole.
For your chance to be a part of this once-in-a-lifetime opportunity, all you have to do is upload your photo via this facebook app https://www.facebook.com/stephenkingbooks. We can’t guarantee that everyone’s photo will make it on – but we’ll contact you when the jacket is ready so you can see if your face is featured, and if you’ve been lucky, you can share your pixels of fame with friends and family!
And Heinercj quoted from the "fine print" in the comments of the page:
"Selected photographs will be printed on the cover of the book using mosaic technology and will only be clearly visible through the Facebook site, not on the actual printed book cover."
So, I think it is correct that the photos of people's faces will be on the actual dust jacket for the book, but too small to really make out. Still, I personally thought it was cool because it reminded me of the scenes of Jack's visit to the rose in NYC and Roland's visit to Maine where King describes the immediate area as being filled with faces making up everthing in the vicinity.
Thanks for the suggestions on the best way to purchase the UK edition.
Daniel