To deal with this issue I've taken a few Gutenberg texts, converted them to LaTex and then rendered then into PDFs designed for my reader (nook Simple Touch). It's laborious, but it looks great.
With that in mind, I convert the Gutenberg etexts to a textual format my eBook will show nicely (joining sentences to paragraphs etc), see http://www.michielovertoom.com/python/gutenberg-ebook-scrapi... , source on https://github.com/motoom/gutenberg-ebook-scraping
(It purports to take the work out of Gutenberg->Latex->PDF; I've not used it, simply had it buried in the back of my head somewhere)