PSA you can convert Wikipedia articles to ebooks using the Wiki Reader plugin for Calibre

Enjoy the bliss of reading niche Wikipedia articles on your Kindle

If you have a Kindle (or any ebook reader), chances are that you already use Calibre. 

Calibre is a free and open-source ebook management software that allows you to organise, store, and convert ebook collections across various formats. It's pretty great!

I recently discovered a plugin called "Wiki Reader" that allows you to convert Wikipedia pages into ebook collections easily.

In Calibre go to Preferences → Advanced → Plugins → Get new plugins → search for "Wiki Reader" → Install

You should see the Wiki Reader option on the top right in Calibre. Clicking on it brings up this dialogue:

Enter the Wikipedia pages you are interested in and generate the ebook. Then, you only need to plug your Kindle into your computer and send the ebooks to the device!

Enjoy :)