The following are books that I found to be free on Amazon. You all know the drill by now but bear with me just in case there are any newbies. First off, you can check B&N or Smashwords if you prefer books from there. Sometimes the price changes take effect everywhere and other times they don't.
Oh and my prices are taken from the Amazon in Us. Unfortunately not all Amazon's run the same sales. :-(
You can click the picture to go to Amazon and get the book. While there, double check that each book you want is still free. Their prices change without notice.
I hope you find a goodie or two from this list. :D