I both read the e-galley and listened to the audiobook version of Monogamy. 
I rated the book itself two stars; however, I think this is a high-quality audio production. 

The narrator's voice suits the age and demeanor of the main protagonist, Annie, whom I did not view as a particularly kind or sympathetic character. (I didn't much care for the other characters, either.) The way that the narrator emphasized certain dialogue underscored its harshness or abruptness for me. Contrary to how it might sound, it worked! 

Overall, I was far more engaged when listening to the audiobook than when reading the e-book.

Monogamy is a thought provoking tale of a second marriage focusing on the sexual desires of each partner.  The audio book is well read and the characters are very empathetic, even in their cheating ways.