I don't know if you're about to become the next George R. R. Martin, but if the plan is to distribute your texts online, you should do it with the proper format, which brings us to the doorstep of an excellent digital book editor called Sigil Ebook. It has solid compatibility with the EPUB format and despite its version number, it has been in development for a good while.
You don't need overly complex tools to write. You could do it in Notepad if you wanted, but its lack of safety against a system error or a power interruption doesn't make it the best option. The whole world was surprised when the aforementioned George R. R. Martin confessed that he uses WordStar 4.0 to write his novels, and personally I think it's a good decision. Once you master a tool, it's natural to stick to it, especially when seeking to maintain a certain level of productivity.
However, once the text is finished, or for some reason you need to deliver a preliminary version, traditional formats are not ideal. Granted: PDF serves as a kind of middle ground, but if we're talking about broader distribution, what comes to mind is a format compatible with digital readers.
How to edit your book in EPUB format
And so we arrive at Sigil Ebook, a digital book editor based on the EPUB format. At first glance, its interface reminds us a bit of old versions of Office, and I admit its learning curve is not entirely friendly, but on the Web there are dozens of tutorials that will help us absorb its basic concepts.
The idea behind an EPUB is that it's easy to insert special fonts, images, audio or video pieces, and Sigil Ebook lets us do all of that. The number of options that modify text style is notable, and includes six types of headings, as well as support for subscript and superscript.
Sigil Ebook was updated on July 24, 2020, and already has a few years of development. The project is completely open source, its code is available on GitHub, as are the latest compiled binaries. As for support, the Windows-Linux-OS X trio is covered. In the specific case of Windows, its installer will add any missing dependencies to the system, while on OS X there are a few extra steps to follow. Don't hesitate to try it.
https://old.neoteo.com/bibisco-completo-software-escritores-novelas/
