Pandoc is a great piece of software. It‘s great on its own, but also is great as a basis for automatic book generation with R Markdown or the Julia Books.jl package that I wrote. People told me not to use Pandoc because I would have a bad day if I ever ran into the boundaries of what is possible. That turned out to never be a problem, the templating system is extremely powerful and provides a lot of flexibility in combination with passing variables directly into the templates