Gossamer by Lois Lowry is the shortest novel by her I've read. It's more mood piece than a full novel. It deals with dreams, nightmares, love and abuse.
Littlest One is learning how to bestow dreams. She is assigned the home of an old woman who is fostering a child with a history of abuse. His dreams are troubled and he's a prime target of the Sinisteed who inflict nightmares.
What I love about Lowry's novels is that they are all so different: in tone, plot and setting. This one I'd classify as thoughtful (and thought provoking) fantasy. On the surface it's just the story of a dream giver learning her craft and an old woman trying to give a loving home to a troubled boy. It's also though about love and patience and their abilities to help one heal from painful experiences.
Lowry's books are typically ones that I read in one sitting and Gossamer is no exception.