Amethyst Peak by Audrey Lynn

Forced to choose between two realms, two sisters must make the ultimate sacrifice.With war raging between Nephel and Goldoth, Morgan’s life hangs in the balance. When an unexpected alliance with Latiah thrusts Avery into the heart of the conflict, the two sisters are finally fighting side by side. They’re determined to end the war and find peace for the kingdoms, and the kings they love.Savine, King of Latiah, never imagined he could forgive Rylo for the pain of the past, and their tentative alliance isn’t making it any easier. But he’ll do anything to keep his soulmate Avery safe, even if that means standing beside his greatest enemy. For Rylo, King of Nephel, nothing matters more than protecting his nation and the witch who has become his everything.But the Goddess Althea is growing impatient. The Divine Five must be restored. As time slips away, so does the safety of every witch in Aeritis and the soulmates bound to their fates.