Every Spiral of Fate by Tahereh Mafi

The story is set around the wedding day of Alizeh, the Jinn queen, and Cyrus, the ruler of Tulan. On paper, it should be a celebration, but Cyrus feels uneasy: he is bound by a blood oath to his bride-to-be, yet he’s falling in love with someone he is supposed to kill. 

Alizeh has a prophecy tied to her people’s freedom: she must kill Cyrus herself to fulfill it. 

Danger looms over the wedding, and betrayal, magic, and secrets surround both the royal union and the political stakes. To protect her people, Alizeh must discover her own magic, outrun enemies, and navigate the pressures of prophecy, loyalty, and love.