Homelessness in America's cities remains a growing problem. The homeless today face the same challenges as in years past: poverty, tenuous or no ties to family and friends, physical and mental health issues, and substance abuse. Compared to the 1950s to 1970s, more homeless are now sleeping on city streets versus in shelters or single room hotels. Homelessness rates are affected by economic trends, lack of equitable and inclusive healthcare and housing, decline in public assistance programs, and natural and man-made disasters. This collection of essays covers case studies, innovations, practices and policies of municipalities coping with homelessness in the 21st century.