Half Moon Chronicles: Predestined - The Half Moon Chronicles, #2

Having reluctantly embraced their role as newly appointed Celestial Advocates, Daniel and Nicolette return to Half Moon Bay. Their rocky but passionate courtship is interrupted as forces unleashed by the previous Advocate's death begin to coalesce around an unexpected target. Caught in an escalating conflict they barely understand, they must protect the hidden Mortal Heir from a shadowy enemy known only as Archangel.
They must learn to use their powers and bring the fight to their enemies before it's too late -- even if it means putting their lives -- and their newly rediscovered love -- at risk as everything rushes toward an explosive conclusion!