I am sloooowly reading More Than Two which has a focus on communication.
the essence of what I loved about a SHOWTIME series called Married & Dating - just be sure to put aside the cheesy skin scenes and listen from the practice for polyamorous folks have to transform their communication ongoingly and you’ll be sure to learn something 🙂
I recall The Ethical Slut easier reading.
I had to put Sex at Dawn down as it felt a bit heavy and theoretical to me (if I remember correctly)
The book that landed for me in 2021 is Polysecure - Jessica Fern does a great job framing attachment theory in the context of consensual non-monogamy that, in my mind, could be extended to the notion of being a solopreneur (business) and dance partnerships (esp in the context of fusion dance)