If you haven't already, take a look at Baen's store
which deals mostly in fantasy and science fiction books. They have a free library
where you can download some of their books for free, and all of their books are also DRM-free. I can recommend The Deeds of Paksenarrion
by Elizabeth Moon. Sheepfarmer's Daughter
, the first book in the series, is available for free in their library.