Amazon.com: Southland Tales: The Prequel Saga: Books: Richard Kelly,Brett Weldele Southland Tales
Sadly the official website was never completed after the movie got stuck in development hell, so there will probably never be as much background info on it as there was on the Donnie Darko site. They also cancelled the hardcover edition of the collected version of the prequel graphic novels too, and I skipped on buying the individual books since their release because that's what I was waiting for... All because of a few retards in France who had to bitch about a movie being ~3 hours long.