Ari and her adopted brother Kay live a life under the radar thanks to the fact that Ari is an illegal alien from Ketch, a planet beyond the barrier, making her a wanted fugitive by Mercer, the corporate entity that rules the galaxy through extreme capitalism. The appearance of Merlin, an aging-backwards wizard, further creates chaos in their lives. Merlin is sure that Ari is a reincarnated King Arthur, whom Merlin is to train to defeat the most evil bad guy and unite the citizenry. Shenanigans, love triangles, and murderous glares occur, as only can when late teenagers are trying to save the galaxy.
This is an action-packed story that will grab readers. I would even say that those who like Tillie Waldon's On a Sunbeam will enjoy it, because, ya know, more lesbians in space. lol That said, imagine Star Trek of last century... when it was progressive and intersectional, but the underdogs. That's what this story is.
Yet Once and Future is actually a blend of sci-fi and fantasy (whereas Star Trek is purely sci-fi). Sci-fi: set in the future with advanced technology with space travel present. Fantasy: magic and wizards (well, singular... one wizard).
Once and Future is the example we need of intersectional genre fiction. PLUS the regular use of "they" as a singular pronoun and beyond-the-binary with a third, "fluid." As such, it's perfect for the readers who spend too much time on Tumblr reblogging all the social justice warrior posts. #guilty