Oathbreaker

In the bleak mountains of the Warhammer Old World, the dwarf race fights a bitter battle for survival against its ancient enemies. When the hold Karak Varn is overrun by skaven ratmen, Dwarf Thane Uthor makes a rash vow to cleanse the hold, despite the enormity of such a task.
How can this band of dwarfs, brave and stalwart as they are, ever hope to triumph against such impossible odds?
This book is now collected in the Dwarfs omnibus.