The nation's first free public lending library opened in Massachusetts in 1790 with a collection of books donated by Benjamin Franklin, and public librarians have been helping Americans figure stuff out ever since. In honor of National Library Week, Mental Floss spoke to five public librarians to find out what they do behind the stacks to keep these local repositories of knowledge thriving. Librarians love helping to settle a bet. “We also lost a boa constrictor once.”Most public libraries have a code of conduct in place so librarians can eject anyone who’s intoxicated or acting abusively. “Since public libraries are one of the few spaces you can go where nothing is asked of you, you get a lot of folks in crisis looking for help,” Ferris explains.