I read a lot of books and never got why books on Amazon’s Kindle were so expensive. $9.99? Greedy authors. A lot of people agree, you can see by just browsing Kindle books:
The customers are firmly in the “The Author / Publisher is Greedy” camp. I never crunched the numbers until I released my own travel book, and I found out why kindle books are so expensive: it is about the % Amazon takes.
So as an author I choose between Amazon taking 65% of my book sale price or the cost of delivery ($.01-$7.50) plus 30%.
So why are kindle books so expensive? Look at Amazon, not the authors.