Chasing Power — Constance Phillips

Chasing Power This is the third book in The Realm's Salvation series. However, it is a stand alone book. For Keiran Saysin, protecting the fairy population from humans is more than a job. It is passion and his duty to the realm. Since Eero's revolution failed -- and the discovery of fairy power lying dormant in some of the human population, that job hasn't been easy. Now that his sister and her husband are welcoming a set of twins, old enemies have come out of hiding, hoping the children will a serve as a key to reclaiming what has been stripped from them. Enter Annie Valentine, the genetic researcher Daniel's mother has employed. Keiran knows the smart thing to do is cast a spell and push the human away, but something about the way she stands toe to toe and eye to eye has him forgetting that getting involved with a human could cost him everything he values, including his power.