It's the same story when it comes to the EPUB's place within the wider digital publishing ecosystem. Previously seen as a limited format compared to other files such as the PDF, increased support and infrastructure is now making the versatile EPUB increasingly attractive for a wide range of digital publishing projects and workflows.
Similar to how writing code directly produces a better EPUB than software, customised use of open source software for converting EPUBs into other formats produces better results than expensive off-the-shelf systems. This last download is fully interoperable and gives you a bit more information about the EPUB, the different reading apps that open them and converting EPUBs into other formats such as print or web apps.