Sponsored by the Bertelsmann Foundation, the International Network of Public Libraries series recognizes the challenges faced by today's librarians. Consisting of sixteen experts from ten countries, the network strives to create a forum in which information and expertise can be shared in order to increase the effectiveness and efficiency of libraries. Their approach is highly practice-oriented; case studies present especially successful solutions. This series is an innovative resource for public library professionals. Jorg Wiemers and Dieter Kranstedt explain the roles of organization accounting, performance accounting and cost accounting in the management of public libraries. They facilitate a discussion of these methods by using the example of the Paderborn City Library, which has implemented and found success through this system.