The Moon Etherium (Etherium #1) | 
Yay, I guessed right in the character identification!
And while I have minimal experience with trans culture and have done zero research on this novel's authenticity (although all signs point to positive), this scene with a seven-year-old using child-logic to explain to his siblings why he wants them to see him as male is super cute.
#notthetaggedbook Why hallo, polyamorous fantasy standalone that I *need* based on title alone and that was before I learned that the princess works spellcraft through knitting, the prince is transgender (I think? reviews seem indicative), and the story genesis was a four-line tweet that the author snagged and ran with.
https://rowyn.dreamwidth.org/640862.html
