A Kiss of Flame (The Lost Queen) by Jessica Thorne

Loosely inspired by Rapunzel, the lost princess has been found—but the closer she is to the throne, the deadlier her magic becomes. For fans of Sarah J. Maas and Scarlett St. Clair. Wren should be overjoyed: she’s gone from being a lonely, parentless girl in the forest to being the daughter of the lost queen of Asteroth. Yet she is trapped in the capital, surrounded by people who will kill her if they discover her shadow magic. And its strength is growing more and more out of her control each day . . . As the son of the enemy, Finn has never been fully at ease in the capital. But now, living there is torture. Keeping Wren’s magic hidden goes against every vow he’s ever taken—and staying apart only makes the strange ache in his chest become unbearable. And with every snatched moment, the solace he and Wren find in each other starts to feel more bitter than sweet. With danger approaching from every side, can Finn and Wren find safety in their love? And can Wren escape from power plays inside the castle to save her kingdom—even if she must save it from herself?