Actually. Looking at the images available in the site and the quality of the imagers producing them, such a book would be an attractive addition to any coffee table.
I had a look at an old photographic book by Hans Vehrenberg "Atlas of Deep Sky Splendors" and I am still impressed with the images taken more than thirty-odd years ago. What is great is the images, but also the little inserts showing the places and the boundaries of the featured objects. I probably learned more about the intimates of deep-sky objects than anything else - especially in wide-field images with many multiple types of objects.
Other than the minor issues I've previously brought up the idea is a good one, and I completely agree it would usefully highlight the so many wonderful quality imagers here. Their pics deserve more exposure. If is has good quality glossy paper - I'd buy one!
Pity the person who will have to sort out which ones to choose from the gambit available. I don't envy them!
Note: As a comment, an "Almanac" IMO is not quite appropriate. Perhaps something more like, say, a "
Image Atlas" or "
A Photographic Register of the Southern Skies." might be a bit more suitable?