Highclere Castle, about two hours west of London, has one of the best private libraries I’ve ever seen. And you’ve seen it too, if you watched the popular TV series Downton Abbey. Highclere’s library contains over 5,000 books dating from the 16th century. The current castle, completed in 1878, is still owned by the family, … More Libraries Round the World: Highclere Castle’s Downton Abbey