A story within a story

There are many stories here which parallel one another. First of all, the most obvious one is the fact that Ralph is shooting a movie about Bogus, who is himself editing the movie as it is being shot. In addition, the story with Tulpen begins to look a lot like the story with Biggie. The way Couth and Bogus pass Biggie between them is reminiscent of the way they passed Elspeth between them long ago. Tulpen also is passed between Ralph and Bogus. All these storylines also coincide with the story of "Akthelt and Gunnel," Bogus's thesis project. Bogus goes into great detail, describing the violent, brutal Norse ballad, which features wife-swapping and revenge. Bogus imagines the people around him in the roles of the characters of the poem. Later, the poem is to be made into a movie, another example of a story...