Sure. 'Ancillary Justice' by Ann Leckie is a great non - binary science fiction. The main character, Breq, was once a ship's ancillary, and the story delves into themes of identity, power, and morality in a far - reaching galactic empire. Another one is 'The Left Hand of Darkness' by Ursula K. Le Guin. It features a world where people have no fixed gender most of the time, which challenges our concepts of gender and relationships.
There's 'Ninefox Gambit' by Yoon Ha Lee. The universe in this book has a complex and unique society that doesn't conform to binary gender norms. It's a military - focused science fiction with a lot of mind - bending concepts. Also, 'Borderline' by Mishell Baker has non - binary elements. The story is set in a world where magic and modernity collide, and the characters' identities, including non - binary ones, play important roles in the plot.
One more is 'Machineries of Empire' series by Yoon Ha Lee. It presents a universe filled with strange technologies and complex politics, where non - binary identities are part of the diverse tapestry of characters. The books explore how these identities interact with the power structures and the overarching storylines of war and survival.