title_body: Is it possible to self-publish ebooks with DRM?
upvoted_answer: Per your comments I have read on EditionGuard that offers an extension for WordPress sites.  There is a fee associated with content but my understanding is you upload your content to them, you can sell through your CMS and they will send a DRM ePub.  I have not tested this yet, but I had planned to in the future when I had time.  Also, note this is for only .epub and .pdf files NOT .mobi files yet.