The novel is set in Washington, D.C., in 1979 and focuses on the Hobbs family. Lester Hobbs, nineteen years old, is mentally retarded and mute ― until the day he suddenly begins to rap at the top of his lungs about life with his parents and older siblings. That development has a profound effect on the rest of the family, whose members struggle to figure out what it means, for Lester and themselves.
Lester's wise-cracking brother, Greg,...