Many institutions are scrutinizing library space as a potential space bank in times of tight capital resources, while librarians are seeking ways to shift lesser-used collections into storage, create more user space, and improve services. Accomplishing these tasks at University of Massachusetts Amherst's Du Bois Library, a 26-story tower, posed a particular challenge. The library's master plan needed to explore compatible uses, partners for integrated services, and identify opportunities to repurpose space for university needs as well as the library's future vision.