Homelessness has now been on the American policy agenda for close to two decades. In 1989, when the Urban Institute published "America's Homeless", by Martha Burt and Barbara Cohen, policymakers and the public may have hoped that we could end the crisis relatively quickly. The arrival of the new millennium has not fulfilled that expectation. In this new volume, "Helping America's Homeless", Martha Burt and coauthors return to the problem with the...