Dominic: Her Warlock Protector Book 1

As a warlock and captain in the Magus Corps, Dominic been deployed to bring Sophia into the fold -- a witchcraft fold that she doesn’t know exists. Although he's immortal, he discovers something unexpectedly captivating in the beautiful, talented, and shy young woman. But he'll need his most powerful magic to protect her from an ancient enemy who would like to see her dead.