No library stands alone. A long-standing tenet of the discipline, library cooperation predates the founding of ALA. Although these are times of crisis and uncertainty for library consortia (by one count, more than 65 consortia have closed since 2008), the collaboration that consortia offer helps libraries extend the value of every dollar spent. With over 70 years of experience managing five different library consortia between them, Horton and Pronevitz are uniquely qualified to show how consortia have been transforming themselves, offering new services and products while growing ever more important to the library community.