You guys think that the places where we saw all those books and pages flying is his plane of Oblivion?

http://elderscrolls.wikia.com/wiki/Hermaeus_Mora

It almost has to be, doesn't it? It's got the tentacles, the books lining the walls... pretty much everything. I can only venture a guess as to why he'd be involved though. We need some information from him, but why and for what perpose is beyond me.

yes I believe it is.

Haven't you been reading the other threads? I can almost guarantee you that it is Apocrypha.

Definitely.