Ok, I have to admit, I'm pretty proud of this one ^^.
I'm not sure how it came about..I was practicing shiny surfaces, so the top right purple book happened, then the rest followed.
I think in the back of my mind I had the Discworld's Unseen University library.
I have to redo the blue fish thing, because it's not very clear.
The whole thing was done in Paintshop Pro, using mostly the smudge tool.