We test a plugin that can find and print many pages from the neighborhood. We test the idea by using a search term as markup. The print button will print all found pages in the order shown. We'll print pages that mention json.
json
Better to have a markup that will construct the desired table of contents and offer to print that.
We can use a roster to combine pages from many sites selecting which sites are to be included in each print.
about.fed.wiki ward.bay.wiki.org ward.asia.wiki.org
We have just enough code to show how this plugin might work. We're happy to accept suggestions as issues. Register a watch if you are interested. github 
wiki-plugin-print
As we push this plugin further we have encountered coding issues that lead us to ask, Why Write Books?
We've pushed on print formatting which has some issues. Maybe we just download a custom export.json file and feed that into other processes. Inventing a markup for organizing content still seems like a good idea. It could be what you put on your welcome page.