Of course I live by RSS feeds, that’s how I do 90% of the content of TeleRead.
I’m sure most of you, if not all of you, know about the free ebook site ManyBooks. But did you know that ManyBooks divides its books into about 60 categories and you can get an RSS feed for any, or all, of them? The feed will alert when when new books of that category are added. If you like history books just subscribe to the History feed. You can also get feeds on audiobooks, pirate tales, espionage, cooking and many, many others. Go over there and sign up for a feed that interests you.
You can subscribe to RSS feeds at Feedbooks.com as well. It’s definitely worth checking, especially new books from original authors » http://www.feedbooks.com/userbooks/recent.rss?lang=en