I read it in a Urban Geography class in college about 5 years ago. I learned about history of suburbs and what he said about the way we live made a whole lot of sense. I have also read "Home From Nowhere", which is a more technical version of "Geograhpy of Nowhere". I highly recommend those 2 books.
I was excited to read "The Long Emergency" since I liked Kunstler's other 2 books, but after reading it I was a little disapointed. It was more a rant than a guide like his other 2 books. If you want to learn more about Peak Oil, I'd look for another book. If you already know some about Peak Oil and want to know one person's opinions about the world then read "The Long Emergency".
If you liked Geography of Nowhere, check out "The Rise of the Creative Class" by Richard Florida. A very interesting book. To quote the website: "Richard Florida's "The Rise of the Creative Class" examines creativity and its effects on economic development."
http://www.creativeclass.org