Does anyone know what this is talking about?
EDIT: I looked this up a bit and found a site discussing this a bit. Apparently there is a blurb about the book saying: "A novel that takes places forty-five years after the Oblivion Crisis, which is the story of The Elder Scrolls IV: Oblivion game and the expansion pack Shivering Isles. It partly bridges the gap for the next game, which is set 200 years after the Oblivion crisis."
Here's the site: http://ve3d.ign.com/articles/news/50980/Elder-Scrolls-V-Tease