Finding a local library is as simple as doing a search for a place and adding a search term such as the word "library." While you are searching for the local library, how about searching for a historical or genealogical society:
Also, don't forget the county websites. Many of them have leads to further information about the county's history.
While you are doing research in the county, make time to visit and research in the court records and talk to local newspapers and mortuaries about their archives and records.