So Let Them Burn by Kamilah Cole

Whip-smart and immersive, this Jamaican-inspired fantasy follows a gods-blessed heroine who’s forced to choose between saving her sister or protecting her homeland—perfect for fans of Iron Widow and The Priory of the Orange Tree. 
 
Faron Vincent can channel the power of the gods. Five years ago, she used her divine magic to liberate her island from its enemies, the dragon-riding Langley Empire. But now, at seventeen, Faron is all powered up with no wars to fight. She’s a legend to her people and a nuisance to her neighbors.
 
When she’s forced to attend an international peace summit, Faron expects that she will perform tricks like a trained pet and then go home. She doesn’t expect her older sister, Elara, forming an unprecedented bond with an enemy dragon—or the gods claiming the only way to break that bond is to kill her sister.
 
As Faron’s desperation to find another solution takes her down a dark path, and Elara discovers the shocking secrets at the heart of the Langley Empire, both must make difficult choices that will shape each other’s lives, as well as the fate of their world.

"By turns hopeful and devastating, So Let Them Burn is a masterful debut with a blazing heart. I was captivated from beginning to end by Cole’s sharp, clever prose and by her protagonists—two remarkable sisters with an unforgettable bond." — Chelsea Abdullah, author of The Stardust Thief