~1,300 individual volumes, ~80,000 images, 8 years
The Art of the Mass Effect Universe
This book covers all 3 Mass Effect games. There are some duplicate images from the other ME artbooks but I think the majority of them are new images. Lots of concept art, finalized images and renders.
This was a bit of a quick scan, there were reflection problems with some pages and the platen extension I made didn't clear it up as I'd hoped.