Forever Reign by V.B. Lacey

Isolated to the spirit plane, Isla Vasileia has received a quest from the ancient gods.

Ever since Isla took the magic from the elementals, the balance of nature has been greatly altered. Violent disasters have wreaked havoc across the kingdoms, decimating villages and tearing families apart. To bring the world back into balance, what was taken must somehow be restored.

When Isla finds herself back on the beaches of Iona, she reunites with Bri, Sebastian, and the former elementals, and they are thrust into a world of secrecy, fear, and lies. Danger lurks around every corner, but so does new love and a chance for a happy ending. Isla is once again caught in a game amongst gods, racing against fate and time to save the kingdoms from destruction, forced to make a decision that will change her world forever.

One way or another, the end will come for all.