Gossamer by Lois Lowry

Where do dreams come from? What stealthy nighttime messengers are the guardians of our most deeply hidden hopes and our half-forgotten fears?

In a haunting story that tiptoes between reality and imagination, two people—a lonely, sensitive woman and a damaged, angry boy—face their own histories and discover what they can be to one another, renewed by the strength that comes from a tiny, caring creature they will never see.