Demonstrating the value of library and information services has been a theme in library discussions in recent years. The application of many different approaches to evaluation has waxed and waned together with the development of theories of evaluation across the humanities and social sciences. Over the past two decades research and activity on library value has seen the adoption of new approaches and an increase in the number of studies. There has been a new enthusiasm for harnessing increasingly sophisticated methods and a great range of metrics has resulted from these approaches. The development of more complex means of valuing library services has taken the road from simple output measures to calculating broad social value measures. This paper provides a summary of a report by Outsell commissioned by the Group of 8 University libraries in Australia which was led by Vic Elliott, then University Librarian, Australian National University (Elliott 2010). (Contains 9 tables and 4 graphs.)