An ARC of Promise of Blood has been added to the Worldbuilders lottery. For those of you who don't know, Worldbuilders is donation drive run by fantasy author Patrick Rothfuss to support his favorite charity, Heifer International.

For every $10 you donate to Worldbuilders, you'll be entered to win one of thousands of awesome prizes donated by authors, celebrities, publishers, and more. The only catch is that the 2012 drive ends TODAY.

So get over there and donate!