The Jasad Crown (The Scorched Throne, 2) by Sara Hashem

In the thrilling conclusion to the Egyptian-inspired Scorched Throne duology, a fugitive queen must risk everything and everyone she loves for the chance to restore her lost kingdom of Jasad.
 
Held deep in a mountain refuge, Sylvia has been captured by the Urabi, who believe the Jasad Heir can return their homeland to its former power. But after years of denying her legacy and a forbidden alliance with Jasad’s greatest enemy, Sylvia must win the Urabi’s trust while struggling to hide the dangerous side effects her magic is having on her mind.

In a rival kingdom, Arin must maneuver carefully between his father's desire to put down the brewing rebellion and the sacred edicts Arin is sworn to uphold. He is determined to find Sylvia before it's too late, but Arin's search unravels secrets that threaten the very core of his beliefs about his family and the destruction of Jasad. 
 
War is inevitable, but Sylvia cannot abandon her people again. The Urabi plan to raise the Jasadi fortress, and it will either kill Sylvia or destroy the humanity she's fought so hard to protect. For the first time in her life Sylvia doesn’t just want to survive. She wants to win.
 
The fugitive queen is ready to reign.