Quoting RJ Covino from 18:27, 13th Jun 2005
I think I'll wait for it to appear on the big screen. I've discovered that all contracts for books tend to come with a rider about signing away the movie rights.
I had a physics teachers once who had written the penguin (or somesuch big publisher) dictionary of physics for A level students; he couldn't really be bothered to edit the 2nd edition a few years later as the money was crap, but his editor at the publisher somehow came up with a couple of grand extra for the movie rights to said dictionary to bump up his advance...