Nothing is known about this location prior to the outbreak. It can be inferred from it's name, it was a public.
After the outbreak, the library became a haven for an unknown number of refugees during the early stages of the outbreak. At some time before Moyers insisted on Travis Manawa accompany him and his team outside the safe-zone, the building hosted an outbreak of its own. After becoming overrun with infected, the National Guard made an attempt to storm the place and clear it, but withdrew after sustaining casualties. The remainder of the national guards abandoned their post and claimed to be heading for San Diego.