Just a ping here as well, as there's likely some wider interest that we just finished a reviewed release of the Markdown version of Ars Magica Definitive Edition on GitHub
Also, the team has fix-review-completed 16 of the 53 books now.
Just in case you aren't following the dedicated thread for the project (it's long, so I assume not too many). This will be my last post here on the topic (I'll get the original work going instead).
Update: The markdown version of DE now has clickable convenience links for TOC, All Virtues & Flaws, Complete Spells Index, Spell Guidelines Index, Bestiary Index, and (wip) Traditional Index. Should be a breeze to navigate.