For good history and conversation about the Big Bend borderland country, I recommend Glenn Justice's web site www.rimrockpress.com. Be sure and click on 'Glenn's Texas History Blog' while you're there.
Mike Cox, a notable Texas author, columnist, historian and bookseller who resides in Austin, has a very interesting book blog at this site: www.lonestarbooks.blogspot.com/ It's all about Texas books--reviews, discussion, etc.