A Court of Thralls and Thorns: Romantasy: Throne of the Blood Fae (The Forth Guild) by Tia Didmon

She wasn't enlisted. She was sold. Ashe Rebec is a chosen daughter of the Order. A syndicate that runs the criminal underbelly in the Kingdom of Warriath. Her stepfather has protected and hid her power from the royal court. But when the king places a hefty price tag on commoners with residual fae magic, he cashes in on the windfall, expecting her to join the other healers. And money isn't the only reason he wants Ashe behind castle walls. As the a newest recruit in the king's elite army she is thrust into grueling trials to determine her elemental powers. And while the king claims to want commoners with magic, his generosity doesn’t extend to the Forth Guild. Testing positive for dragon magic is an affront to every noble in the castle. Especially the kings fourth son, Prince Zander Rayne who is bonded to the largest silver in the horde. As the war with the Blood Fae escalates, Ashe unravels links to her past, her heritage, and her family's motives—but with a kingdom that wants her dead and her fate tied to a vengeful royal, how can she survive when her deadliest adversary is her own dragon? Read more