The purpose of this essay is to examine what happens with library e-resources after implementing the discovery tool Summon. Summon provides a Google-like experience and uses multiple facet options when users need to narrow their discovery. Observations of change in the libraries e-resources with regards to database searches, click-throughs in linkresolvers and full text downloads are examined through looking at earlier reports and statistics from libraries in America and England. This provides a way to compare with Chalmers University of Technology’s Library. This essay presents results that suggest that usage drop in database searches while full text downloads and click-throughs increase when Summon is implemented. Also discussed in the essay is the importance for libraries to continuous evaluate the use of their resources to keep up with their users needs and demands. / Program: Bibliotekarie