Gossamer (by Lois Lowry)

And there is an angry boy, taken from an abusive home and placed in foster care with a lonely old woman. The old woman needs the strength to help the boy, his mother needs to pull her life together to get him back, and the boy has become the focus of a Horde. The only help available to any of them are a very young dream-giver-in-training and her elderly mentor.

The juxtaposition of this sweetly reassuring part of the story with the serious abuse that the boy has endured is a bit jarring, though author Lois Lowry handles it delicately. Still, a child sensitive enough to revel in the dream-givers might need some adult explanation of how a father could do these kinds of things to his child.