on Jane Friedman site:
Writing a novel with a dual narrative—where two different characters get to share their point of view as narrator—can be a particularly fun creative project for an author. But it comes with its own unique set of challenges, too.
How do you make it clear which character is narrating? How do you fit the two arcs together? What makes these two narratives one novel, instead of two separate stories?
These and other crucial considerations can make then difference between a manuscript that sings with resonance and tension, and one that flops under the weight of confused story lines, conflated characters and frustrating breaks between arcs.
Here, we’ll explore some of the most important aspects to consider while drafting.