Michael Shellenberger’s “San Fransicko” raises important questions about homelessness in San Francisco, but his answers are mired in controversy.Michael Shellenberger’s “San Fransicko” raises important questions about homelessness in San Francisco, but his answers are mired in controversy.Read MoreBooks and Literature, Homeless Persons, Mental Health and Disorders, Affordable Housing, San Francisco (Calif), Oakland (Calif), , Shellenberger, Michael