See also markdeep[1] (extension of markdown) and remarkable[2] (desktop app)

Personally, I use pandoc and customize using xelatex [3] to generate beautiful pdfs for self publishing

[1] https://casual-effects.com/markdeep/

[2] https://remarkableapp.github.io/linux.html

[3] https://learnbyexample.github.io/tutorial/ebook-generation/c...