Originally Posted by HarryT
God, no, don't use RTF. It doesn't support hyperlinks, or a table of contents, or pictures, and has very large files. RTF was never intended to be anything else than an "interchange" file format, and that's still what it's best for.
It's very little additional work to produce a "real" eBook.
That would depend entirely on what the OP wants and needs to do with the material. If you want to create a 'book' with chapters and hyperlinks, etc., yes. But if you have some short articles, or short fan fiction stories for example - stuff you just want to be able to read on your e-reader without too much hassle - RTF (or PDF created in the right page size) is perfectly adequate. Don't make it more complicated than it needs to be.