You can find more data on average ebook prices for Amazon, indie, and self - pub ebooks over on the Author Earnings website. (talkingnewmedia.com)
Episodes are between 10,000 and 20,000 words long (around 50 - 100 average ebook pages, or 1 - 2 hours of narrated audiobook). (jchutchins.net)
If we keep this process going for as many years more as this has been going on already, there is no reason average eBooks should not be as accurate, or even more accurate, than books being published on paper. (gutenbergnews.org)