I've played a lot of this game, but I will admit that I find something new most times I play, however I've found no references(beyond what happened to Morrowind) to the events in either books which is quite surprising considering the books are "canon". Share with me any references you have come across (not what happened to Morrowind).

When asking Ysolda in Whiterun about the sleeping tree she says something in the line of: "Some people eaven say it fell of a flying city." =)
I was very chocked to hear that, pretty cool.

I too... found it very intersting, and made me thinking about a future expansion of the game, maybe not the first one, something like shivering isles