"$20 per Gallon" by CHRISTOPHER STEINER

Haven't read it yet but here's a excerpt from someone who has:

"Mr. Steiner has written a book full of fanciful predictions, some of which should probably be taken seriously, though certainly not all of them. Here are just a few: $8 gasoline will doom most United States airlines. When gas reaches $10 a gallon, Disney World will close. At $12, suburbanites will no longer be able to afford McMansions or their long commutes. And, at $14, it will be too expensive for Wal-Mart to gas up the truck fleet that moves goods around the country...Mr. Steiner asserts that good would come from such a future. He writes that it would force us to upgrade our public transportation systems, renovate our cities, get around more on foot and eat more locally grown food."

http://www.nytimes.com/2009/09/06/business/energy-environment/06shelf.html