The article considers the library cooperation problem and some aspects of the relationships libraries coalition - library - end users. The authors describe the successful model of the first libraries coalition in Bulgaria - Bulgarian Information Consortium. Problems of creation, management practice, activities and achievements are presented and discussed. The role of electronic resources is viewed and analyzed from the perspective of library collaboration. The usage of these resources is shown as a powerful driving factor for libraries development and cooperation. It allows them to overcome behavioral, organizational, and economic problems and to start their real modernization. The libraries cooperation in Bulgaria begins just by shared electronic publications usage and continues mainly on this basis. We do believe that this is a one direction way and there will be no return journey for Bulgarian Librarian society.