This book discusses a central theme for communication science and organizational research: the relationship between concepts of organizational communication and public relations. Public relations is typically understood as a specific form or function of an organization's communication. Nevertheless, PR practice and even PR research can be conducted without an explicit reference to theories and concepts of the organization. Critics point out this neglect of the organization, its structures, internal processes, and informal communications. This anthology fills this gap by revealing the development lines of PR theories and organizational communication, presenting new approaches to combine both directions, and introducing fields of investigation as well as empirical approaches to the internal communication of organizations.