I myself don't publish but I've seen some authors use Markdown and [1] GitBooks. Kelsey Hightower wrote Kubernetes: The Hard Way in the same manner [2]. It read

I myself don't publish but I've seen some authors use Markdown and [1] GitBooks. Kelsey Hightower wrote Kubernetes: The Hard Way in the same manner [2]. It reads nicely. For publishing, you could look into GumRoad [3]. When I do some technical writing, I personally like to use StackedIt which supports Markdown and allows you to export to PDF with custom layouts. [1] https://www.gitbook.com https://www.gitbook.com [2] https://github.com/kelseyhightower/kubernetes-the-hard-way https://github.com/kelseyhightower/kubernetes-the-hard-way [3] https://gumroad.com https://gumroad.com [4] https://stackedit.io https://stackedit.io