'The boundary between society and the library is porous,' Susan Orlean has written. 'Nothing good is kept out of the library, and nothing bad.' What do libraries mean to us – as public places and civic institutions? Why do attacks on libraries evoke a special kind of horror? And what do libraries represent in the collective imagination and in literary history? In partnership with State Library Victoria, we brought together two great American thinkers who have spent years of their lives immersed in the world of libraries. Paul Holdengräber was…