"Seventeen-year-old Grace Holmwood has been seeing things: bright lights, apparitions of her long-dead twin, even images of the Virgin Mary. In the small pastoral village where she has grown up, her visions take on religious meaning. But when Grace becomes pregnant while still a virgin, the prospect of an immaculate conception sounds an alarm throughout the community." — quoted from the first printing of the Harper mass market paperback's back cover.
Source · ISFDB CC BY 4.0