It's fair use if you use snippets for commentary purposes, and you don't post all of the content.
My plan is to post in my own words what he says that's boring and then spoiler his own writing, the funny interesting stuff, which people can then comment on.
You can see in the Schoenberg thread how Fangs did it for Michaels and Susan's book.
As for narrating the full book, you would be on shaky ground legally. If you do it, you might want to make sure everything is hard to trace back to the real you. It'd be safer if you did snips.
Use a fake Amazon account, buy it with a gift card with no name, and as long as you are safe here Rusty can't find you. Nothing is foolproof and if ordered Null has to give you IP, but I don't think the Feds are going to care about too much of his book being read. He doesn't have the money to hire private detectives.
