I just finished reading Dragon Stones by James Viscosi... if you're looking for something in a single book rather than a series, this is a great read. The story is very well done, told from five different viewpoints, interesting characters.
Amazon has a very good price for this book (around $3). The author's blog links to lulu where the epub costs three times as much, which I wasn't willing to spend on an unknown-to-me author. Couldn't find any epub source in Amazon's price range. Oh well.