If you use Windows, take a look at Jutoh.com. It's commercial but not very expensive and excellent for creating .mobi and epub books. It's strength include sup

If you use Windows, take a look at Jutoh.com. It's commercial but not very expensive and excellent for creating .mobi and epub books. It's strength include support for images, tables and source code listings and it has excellent compatibility checking. The author Julian Smart is also the creator of WxWidgets and Jutoh is very fast at compiling Ebooks. He is also very good at support; I suggested a feature and he had it implemented in a couple of days. I created a 350 page non-fiction ebook.