[joseph8th]

And here's an Emacs org-mode compatibility layer to make writing your own D&D-style campaigns or handbooks even easier (if you grok Emacs):

https://github.com/xeals/emacs-org-dnd

Written around the same DND-5e-LaTeX-Template as the OP article:

https://github.com/rpgtex/DND-5e-LaTeX-Template