From EQLive, here's a sneak peek of the House of Thule, its upper floors, and its library:

House of Thule

This is the shared worldly focus of the Thule siblings, Morrell and Terris. From here, their influence seeps throughout Norrath. As adventurers explore the house, they see the souls of Norrthains trapped within their nightmares. It seems as if Terris is shifting the balance of power in her favor... But is that true?
 
The Upper Floors

Here, the dream state of the House of Thule is even more evident. Each wing transforms, taking on the character of some of the more powerful dreams that are exerting control in Norrath.

The Library

Any great home needs a library, doesn't it? This one looks like any other library upon first glance. Closer inspection leads the adventurer exploring the House of Thule to ask some questions. How is it so large? What is that over in the corner? Are those books supposed to do that?

You can check out several more House of Thule screenshots over at EQLive.