The purpose of this master's thesis is to describe the expansion of Sundbyberg public library during the decade 1954 to 1964. Our focus of interest is the library’s concentration on public relations in 1954. During the experimental year 1954 a public relations librarian, Bianca Bianchini, was employed. Her task was to introduce the library to the citizens of Sundyberg who were not already using it. As a background to this concentration on public relations we also describe the early development of the public library in Sundbyberg. Development work in public libraries has been dependent on local initiatives and enthusiasts since the libraries were a voluntary part of the municipal activity. In this thesis we focus on some of the more important actors in this respect and the structures they interacted with. By using an actor-structure approach we try to explain why people took certain actions and the effect they had on the course of events. The method we have used is mainly to examine and analyze source material, which consists of newspaper clippings, minutes of the municipal council and interviews with people who then worked in the library. We have found that the main reason for the concentration on public relations in 1954 was the surrounding structures on a national and local level, such as the strong Swedish economy, an increasing interest in public relations and a committed board of Sundbyberg public library. But we can also see that the commitment of the various actors likewise played an important part.