I completed these 4 Lionel Robbins EPUBs:
(First Edition): http://misesbooks.blogspot.com/2013/02/an-essay-on-nature-and-significance-of.html
I may or may not do work on the Second Editon of “An Essay on the Nature and Significance of Economic Science”… by the time I noticed there was a Second Edition scan also on Mises, I had already completed the first one. It sort of sucked out my motivation to continue working on that specific book. I may just delay the Second Edition EPUB for a future date, and work on other projects in the mean time.
http://misesbooks.blogspot.com/2013/02/the-economic-causes-of-war-by-lionel.html
http://misesbooks.blogspot.com/2013/02/the-great-depression-by-lionel-robbins.html
http://misesbooks.blogspot.com/2013/02/the-theory-of-economic-development-in.html
Tomorrow, I will begin work on the last Lionel Robbins book called “The Theory of Economic Policy”.
A commenter requested 'Instead of a Book" by Benjamin Tucker. It is not on Mises, but it is public domain (and I submitted it to Mises to potentially get approval). It is a self-published book with many of Tucker’s writings from Liberty:
http://misesbooks.blogspot.com/2013/02/instead-of-book-by-benjamin-r-tucker.html
On the official front, this Ron Paul PDF/EPUB has a new intro:
https://www.mises.org/document/7007/Pursue-the-Cause-of-Liberty-A-Farewell-to-Congress