I am very interested in the power of narrative and how it shapes our enculturation and our perception of the possible. One example of a novel that changed the way people perceive reality, and the possible, was Upton Sinclair's 1906 novel The Jungle.
The poly memoirs that have been coming out are great; but the ability of an author to build a story in a memoir is constrained by details of history. Details can get in the way of the greater narrative. Plus, some of the recent memoirs are a little focused on "how to".
So far, Dr. Maria Pallotta-Chiarolli is the only person I know who has published a good real contemporary poly novel with her unique Young Adult book, Love You Two. The field seems to me to be open (pun intended) for some more "good" poly novels.