GitBook PressBooks are also very affordable and great options that are built with web technologies and are slightly less manual. https://www.gitbook.com/ https

GitBook PressBooks are also very affordable and great options that are built with web technologies and are slightly less manual. https://www.gitbook.com/ https://www.gitbook.com/ https://pressbooks.com/ https://pressbooks.com/ GitBook is targeted at people creating technical documentation in Markdown. It has the advantage of git integration so it’s possible to branch & merge your way through a book project. Their GitHub account still hosts the legacy open source editor and cli tools, although the project has moved on to focus on the commercial web-based editor. https://github.com/GitbookIO?tab=repositories https://github.com/GitbookIO?tab=repositories PressBooks is targeted at authors who want to self-publish and has a nice set of book templates (styled by book genre) and a workflow for selling print books on Amazon. Scrivener (mentioned by dangoor in another comment) is a writing tool with advanced features for different manuscript formats (screen plays, novels, etc) and has cool features for organizing notes, ideas, and references.