I have been working on converting all of the Mises books into EPUB. Links to all of my work can be found on my site here:
http://misesbooks.blogspot.com/
All typos of the books are put on the wiki here:
https://wiki.freecapitalists.org/wiki/MisesWiki:Typos
Here is a topic you can post typos in as well:
https://forum.freecapitalists.org/t/book-typos/23377/5
And in between all of this EPUB making, I also decided to start a reading/fixing of the Human Action EPUB (this will take months, and could always use some help):
https://forum.freecapitalists.org/t/human-action-epub-typos/24645