That is one of the coolest spellbook changes I've seen
Just a suggestion though (This is coming from the opinion of a shaman =P)
Maybe there could be slightly different versions for different classes (probably too much work to do it though).
But for shamans I would take out that circular(sp?) Design in the background and maybe replace it with the look of the shaman epic. That look ring thingy around the end of the spear.
Here is an awesome pic of the epic.
Just a suggestion though. I'll probably do something like that..soon as I learn the first thing about doing something like that
Awesome though, keep up the great work