This thesis is a qualitative study of "Bryggan" ("The Bridge"), a three-year co-operation project between the public library and different associations in Vastervik. The aim of the project was to find new forms for co-operation, which could help both parts in their marketing. "Bryggan" is characterized as an action-related research project, where experiences from the work have been evaluated regularly and have been incorporated to the following process. A study of literature, dealing with adult education activities, developing activities, library extension and democracy, gives the theoretical basis both to the project and to the thesis. The case study describes the different kinds of co-operation during the three years, both with the associations and with other groups and institutions involved.

A qualitative interview study was made with five library employees and five association members. After having participated in the "Bryggan" project and analysed the interviews, I assert that it is possible to change and develop the activities of the public library through a purposeful collaboration with different associations.