The document discusses the late night services provided at the University of Maryland Libraries. It began with an overview of the late night services offered at McKeldin Library, which is open until 8am Sunday through Thursday during the academic semesters. It provides circulation, equipment loans, reserves, and a tech desk overnight with around 160 student hours per week. It then discusses the challenges faced, including safety and security, staffing, communication, and weather issues. Graphs are shown depicting average weekly usage patterns. The document closes by noting some of the ongoing challenges including safety, supervision, staffing, weather, and facility maintenance issues.