Installment immortality

After four generations of caring for the Price family, Mary Dunlavy has more than earned a break from the ongoing war with the Covenant of St. George. Instead, what she's getting is a new employer, in the form of the anima mundi, Earth's living soul made manifest, and a new assignment: to hunt down the Covenant agents on the East Coast and make them stop imprisoning America's ghosts. All in a day's work for a phantom nanny, even one who'd really...