I found a page of links to 20 free B&N Classics whose listing pages probably should have expired last year. When Barnes & Noble releases a new Nook, they usually offer some of their republished public domain texts for free. All of these titles are currently listed for $3.99 if you search for them under Nook Books on their website, but these pages are still giving them away. I just downloaded them all, so all the links work. B&N Classics are easily the best versions of public domain titles out there. They include interesting prefaces written by modern scholars and lots of supplementary material. The eBook formatting and TOC are always flawless. Enjoy.