It's always good to see what people think someone is saying vs what the person really wants to say especially re: books. This is Douglas Hofstadter on why GEB.pic.twitter.com/SZZLNnjvXt
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
This paperback includes a 20th anniversary preface which has commentary from Hofstadter.
The cross country trip anecdote reminded me of one of your posts in the regenerations series (in car at home).
What is with USA, cross country road trips and writers? 
It's GEB, almost forgot to point that out.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.