This text is about the work of communication theorist Denis McQuail, specifically his book "Mass Communication Theory" which was first published in 1983 and has been revised and updated several times. The book covers various perspectives of mass media, including sociological, cultural, and media industrial viewpoints. It also discusses the concept of mainstream media and how it is often used to refer to media that is not part of the dominant or traditional view. McQuail's work has been influential in the field of media studies, with his theories being applied to the study of various forms of communication such as political programs.