Grendelstine

Publisher's blurb:

The heights of Bloodstone Mountain have ever been shrouded in mist, born, most say, of the restless fires within her belly. While lesser men speak of Dragons and tell tall tales of Giants working their smithees beneath the earth, those brave souls that have dared trespass there know Bloodstone by another name, Grendelstine, the castle that once guarded its mines now a prison of agony. For there does the dark lord of the land keep all who defy him trapped within the Hell of that ruined castle. And now, he is sending you there! But ever does evil undo itself, for within the fiery bowels of the mountain there are others trapped as well, who can help you even as you lead them to freedom.