Recs if you like The Thread That Binds (Eternal Library #1)...

This is NOT for books featuring trans or nonbinary protagonists in worlds with gender systems that mimic modern real-world ones. This is for books like Left Hand of Darkness or the Imperial Radch series, where the setting has an invented system of gender and/or sex, or of assigning gender/sex. I'm including interesting-to-me matriarchies (so, not ones that are just our patriarchy but gender-swapped) and gender systems that include male and female but have other genders/sexes too.

Suggestions are extremely welcome!

Books that feature queerplatonic relationships! Since I have not yet gotten around to reading all of these, please let me know if something I included doesn't fit the list (with some of these I'm purely going off of what I've heard from others). Similarly if you know a book that would fit on here please tell me about it!

A list of books in the SciFi/Fantasy genre that heavily feature polyamory. Excludes harem romances, but includes other forms of romance.

Inspired by @fivepines who made a list for books with main or side characters who use neopronouns 💗

Fantasy ebooks available through the Kobo Plus subscription. If you have any recommendations, please let me know! For book series, I've only put the first book, but the entire series will usually be available. For some series, the first book is also free but the rest are available through Kobo Plus.

SFF books from small presses and self-published authors that feature important aromantic characters

Recommended polymamrous fiction from polyamorous romantasy author Andora Brokaw. (Note, not everything on this list is fantasy. But it does all feature positive portrayals of polyamory.)