kindle reading in looking for OD-ers

A few months ago, I got an offer to receive a Kindle Fire from a website where I had "points". Since the device was free, I vowed always to get free books. I love the fact that books in public domain (the copyright is expired) are free. I've been re-reading the books of Gene Stratton Porter - I read most of them when I was growing up. Currently, I am reading Laddie, A True Blue Story.
The author wrote about 100 years ago, so it's a glimpse into lives, mostly rural, and the differences between men's and women's roles at the time.