In this thesis the marketing strategies of two public libraries have been explored and studied.The public library of Kalmar participates in the project GÖK which partly is a marketing project. The public library of Kalmar thereby differs from the public library of Trollhättan which is not involved in the project.The main aim of this thesis was to focus on their marketing strategies and see if there were any differences. The thesis was also concerned with the customers and their experiences of the quality of the services offered by the public libraries of Kalmar and Trollhättan, including the customers' perceptions of the operative marketing, and finally if there was a connection between marketing and customer-centered quality. Qualitative methods as well as quantitative methods were used for the collection of information .The preliminary assumption that Kalmar had a more explicit marketing strategy has been confirmed in the study. However, the customers at the public library of Trollhättan were more satisfied with the total quality of the services offered. This study has shown that a marketing strategy does not automatically result in more satisfied customers.