This is a battlemap-scale encounter maps presented in both full color and a very viewable greyscale. The standout feature for this series is the effort the publishers went through to make it usable for virtual tabletops as well as printouts: not only did they include the map as a full-size JPG showing all the tiles together, they also put together a version for Maptools—including the vision blocking layer!
The Ruined Library depicts a central structure with two wings in a desert or barren environment that appears to have been devastated by boulders - maybe meteors, maybe thrown by giants. The shattered remains of bookshelves and their contents lie scattered across the floor. The art is well done and very attractive, but the cartography is somewhat lacking in the small details - the fallen shelves are incredibly sparse (none of them overlap) and there appears to be no other furniture in the building. Still, it definitely gets across what it sets out to.