Chris updates some figures from his original article where he had written that "57% of Amazon's book sales are of books not available in stores". He writes in an update, "I've now spoken to Jeff Bezos (and others) about this. He doesn't have a hard figure for the percentage of sales of products not available offline, but reckons that it's closer to 25-30%. That would put it in line with Netflix's and Rhapsody's figures." There is an interesting discussion going on in the comments as well.