I'm in Marin. Where is 'castle in the sky'? Is it an art store?

I've been shy about posting because I'm not sure if what I do is really called an altered book - right now, I'm making jewelery/treasure boxes out of books.

I do have this vision of a piece I want to do - I had a dream I'd like to capture and I'm planning on doing it in a large flat book like an atlas or something.

The whole book thing also appeals to me because of the 'collage' aspect of it. I save trinkets and scraps of paper and fabric and am always looking for some way to use them.