Embers to Flames by Amber Eggert

In a world where Elves reign supreme, humanity teeters on the brink of collapse, ravaged by a sinister drug that sows chaos and despair.
Rosanhi, a spirited human girl, is drawn into an ancient prophecy through a fated ceremony, unraveling hidden truths about her lineage and a love foretold by destiny. As she navigates a realm brimming with peril and enchantment, her fiery romance with an enigmatic elf becomes a beacon of hope against an encroaching darkness.
Embers to Flames is a tale where not all princesses need a prince, but they sure are nice to have around. Rosanhi’s journey is one of fierce independence, the bonds of family, the discovery of true love, and the unwavering belief in oneself.

Rosanhi must prepare to stand against the darkness that stirs beneath the surface of her world. She will soon face a war of power and a war of the heart.