Gossamer by Lois Lowry 140 p.

Where do our dreams come from? Littlest One, a young and earnest spirit in training to become a dream-giver, is learning to gather bits of memories from people's belongings (a button, an open book, a seashell) and to bestow reassuring, happy dreams. She is assigned to help an elderly woman and her foster child, a young boy abused by his father.