Some of the imagery in this episode was quite something. Shiori falling into, and then being rescued, from the pile of books, Keima appearing on top of the bookshelf, the fact that much of the start of the episode was done sans dialogue - it was more like a ballet than a story, telling its tale through imagery. A nice conclusion to Shiori's story, with nice use of the Oratorio in the background. I think next week's the final episode.