Humans are social animals and, in general, don't thrive in isolated environments. Homeless people, many of whom suffer from serious mental illnesses, often live socially isolated on the streets or in shelters. Homelessness, Housing, and Mental Illness describes a carefully designed large-scale study to assess how well these people do when attempts are made to reduce their social isolation and integrate them into the community.

Should homeless mentally ill people be provided with the type of housing they want or with what clinicians think they need? Is residential staff...