The audiobook for Tesla St. Vrain, the Power Within is now available! The narrator did a great job. It took over 60 voices, including French, Irish and German accents as well as dialog in those languages. She added a little reverb to the voices of the ghosts to make them sound a little eerie.
https://www.audible.com/pd/Tesla-St-Vrain-The-Power-Within-Audiobook/B0C383Y6PH