See my follow-up post to see why Dragon Keeper is no longer offered for free.
Dragon Keeper by Robin Hobb is the first of three novels in the author's new Rain Wilds Chronicles and, at least for now, it's free for Kindle owners.
While this is a new series, it takes place in the same world as Hobb's Farseer, Liveship Traders, and Tawny Man trilogies. It most closely follows the Liveship Traders series as both contain elements of the Rain Wilds. Of course, the Farseer Trilogy had dragons, and so does this new series, so perhaps it's best to say it builds on most of Hobb's previous work in this world. Wikipedia collectively calls all of these books The Realm of the Elderlings series.
Apparently this freebie idea was tried with great success when the Farseer Trilogy came to the Kindle last year. The first eBook in the series was released and sales for books two and three did very well. Guess you could call it a "3 for 2" deal.
While I loved the Farseer books, I wasn't terribly enamored with the Liveship Traders series. In fact, I barely made it through book one. But I enjoyed The Soldier Son Trilogy (even if some others did not), so I was actually looking forward to giving Hobb another shot.
This one is already sitting on my Kindle, waiting to be read.
Of course, the kicker here is you have to own a Kindle. Sorry traditional book readers.