Once and Future by Cori McCarthy, Amy Rose Capetta; 2019. Hardcover. (YA)

King Arthur as you've never imagined! This bold, sizzling YA retells the popular legend with the Once and Future King as a teenage girl -- and she has a universe to save.

I've been chased my whole life. As a fugitive refugee in the territory controlled by the tyrannical Mercer corporation, I've always had to hide who I am. Until I found Excalibur. Now I'm done hiding. My name is Ari Helix. I have a magic sword, a cranky wizard, and a revolution to start. When Ari crash-lands on Old Earth and pulls a magic sword from its ancient resting place, she is revealed to be the newest reincarnation of King Arthur. Then she meets Merlin, who has aged backward over the centuries into a teenager, and together they must break the curse that keeps Arthur coming back. Their quest? Defeat the cruel, oppressive government and bring peace and equality to all humankind. No pressure.