Slideshare: Free Ebooks to Increase Ebook Sales.

Here's an interesting article from Mark Coker, the owner of Smashwords, regarding a study he did of e-book sales and the trends. Also, he wrote a book that he is giving away to help authors and publishers with e-book sales, too.
What questions does the study answer?

Do authors who change prices frequently sell more books?
If ebooks are immortal, how do sales develop over time?
How do individual titles develop at a retailer?
What's the ideal word count for ebooks?
What word count do romance readers prefer?
What word count do erotica readers prefer?
What impact does price have on unit sales?
How are Smashwords authors pricing their books?
What are the most common price points?
What price range earns the author the most money?
What does the indie ebook sales distribution curve look like?
What's the optimal price per word?

The answers are in this slideshare: http://www.slideshare.net/Smashwords/how-data-driven-decisionhow-datadriven-decisions-might-help-authors-reach-more-readers
For three free ebooks, click here: http://blog.smashwords.com/2012/04/can-ebook-data-reveal-new-viral.html