Burn of the Everflame by Penn Cole — book slip

In the north, Ophiucae and his army of bloodthirsty mortals seek to eradicate all Descended from the continent. In the south, the Guardians of the Everflame lie in wait, plotting a rebellion generations overdue.

In Lumnos, Realm of Light and Shadow, the Crowns are gathering. Caught between two deadly foes, they must form an unlikely alliance to save their people.

But the Crowns have a secret—and a heart without its mate will burn the world down to fulfill its fate. Hatred reigns. Hope seems lost. With the future in darkness, can a flame emerge to bring the light?

For fans of A Court of Thorns and Roses, Throne of Glass, and From Blood and Ash.