This will come in handy, thanks for getting this going.
I get most of my guides from the Book Depository, works out cheapest for me than Amazon.
Just a couple of suggestions to add:
Assassin's Creed III
Borderlands 2
Batman Arkham City
Dark Souls
Uncharted 3
Incidentally, I did notice that there were two different versions of the Dark Souls CE guide. One was slightly smaller than the other and somehow felt inferior. Don't know if they contained the same number of pages as they were sealed.