This paper focuses on the use of elaborated computer visualization techniques to support multi-user browsing within a digital collection of library books and subject categories. First, a short description about the research project is given, and the two different interfaces of the developed application, called ‘Explore Interface’ and ‘Browse Interface’ are described. Then, some of the theoretical issues and practical use of the interfaces are presented. Finally, the experiences gathered from this research project and their impact on possible future working directions are summarized.