The Baument.com site has a bookshelf prop loaded with books you could use to line the walls of a room to simulate a library/den, or line up in rows back-to-back to fill out a city-library-type scene. It's in the Archives. I don't recall if it's in Poser format, you might need to import it. TONS of other excellent free meshes as well. They've got several CD's of great stuff for sale also, and you can sign up for a free Email notification whenever they post a new free download. Hope this helps your project.