Update: As it turns out, there's many more where that came from. Carcassonne is part of Amazon's current "Over $100 in Essential Apps FREE Thursday and Friday Only" deal. It's joined by a slew of free apps and games.
There's always a free app of the day in the Amazon Appstore, but sometimes consumers are treated to multiple giveaways on the site at the same time. Today's free app, Sorcery, is joined by Carcassonne, which just happens to be going for the glorious price of $0.00 at the same time.