The article Taking Aim at the Reality of Guns in Libraries (AmericanLibrariesMagazine.org) takes a thorough look at state laws throughout the country, and how they relate to the right of libraries to declare themselves gun-free zones.
Wherever you stand on carrying (whether openly or concealed) guns in libraries, you should probably read the article and be aware of your state’s statutes on the issue.
A Life in Libraries 