The main focus in the anthology is on the breakthrough of popular music in local radios. The articles raise a number of important issues in the recent history of radio broadcasting in Finland: regulation of broadcasting, ideologies of local radio, concentration of ownership, homogenisation of musical content, patterns of change in radio speech, and processes of music selection. Article authors are the following: Pentti Kemppainen, Timo Syrjälä, Vesa Kurkela, Heikki Uimonen, and Maija Kontukoski.