Amazon are offering free downloads for limited time periods. Two of my books are currently free on amazon.com and amazon.co.uk. I don't know how this will pan out eventually, but The Power of Persuasion has been downloaded 4,010 times since Friday June 3rd:
Free download for Kindle (US)
Four Short Stories has been downloaded 1,465 times:
Free download for Kindle (UK)
It is all very exciting!