This broad, balanced introduction to studies devoted to organizational consultation enables the reader to compare and contrast different approaches to the study of professional consulting services. Organizational consultation is a type of interaction between two organizations: client and consultant. The interaction of client and consultant is described and explained from the point of view of nine different theoretical perspectives: symbolic interactionism (Mead, Blumer, Turner), Weberian organizational theory, new institutional economics (Jensen, Meckling, Williamson), dramaturgical sociology (Goffmann), micropolitical approaches (Crozier, Friedberg), functionalism (Parsons), systems theory (Luhmann), neo-institutionalism (Meyer), and postmodernism (Foucault, Derrida, Lyotard). These represent the major theoretical approaches from sociology, economics, and organization sciences.