A novel I read at least 15 years ago was about a dwarf who was visiting a human woman he had known for years. He referred to her as Sif, I think. At the time of the visit he was one of the last dwarves left. He told her about a time when dwarves were common and he was a member of a mixed group of dwarf and human fighters. A large amount of time was spent describing berserk warriors and a period in his life where he was out of control and was a berserker himself. I remember the novel was fairly short ~ 250 pages or so and was not a series. I wish I could remember more but that is it.