Gossamer, by Lois Lowry, 2006

Littlest One and her trainer creep under doorsills and flutter throughout houses while people sleep, hovering over their special things and finding fragments of memory. They blow these fragments into sleeping human ears to bestow dreams upon them, dreams of laughter and hope and courage. But in one house, where eight-year old John waits to be reunited with his mother, nightmares stamp and whinny at the door. A blessedly Freud-free dramatic exploration of dreams; a different approach to middle-grade fiction about foster children and child abuse. Compact, potent, a persuasive fantasy, a hopeful overcoming. Recommended.