I'm trying to find a good software program that will allow me to create ebooks, primarily from PDF or .doc, that I can then upload to sell on Amazon, Apple, etc. for Kindle, iPad, the Sony Reader. I've seen many online, but it's hard to judge which is worth it. I am trying to find the top programs. Or even a site where someone has reviewed these programs. If you have any tips, they'd be appreciated. Thanks!!