From the product website:
Dungeon World is a world of fantastic adventure. A world of magic, gods, demons, Good and Evil. Brave heroes venture into the most dangerous corners of the land in search of gold and glory. You are those heroes. You go where others can't or won't. You conquer the unbeatable and laugh in the face of Death. There are monstrous things lurking in the world. Are you ready to face them?
This full book extends the Basic game presented at Gencon 2011 into the complete game.
- Dungeon World Roleplaying Game