Case studies are often not available for purchase by libraries. Many need to be purchased by individual users.
"The case method of analysis involves studying actual business situations, written as an in-depth presentation of a company, its market, and its strategic decisions, in order to improve a manager's or a student's problem-solving ability. Cases typically investigate a contemporary issue in a real-life context. There are multiple issues to consider and many 'correct' or viable alternatives to solve the case issues are presented." --Encyclopedia of Management. (4th ed.). Detroit: Gale, 1999. (p. 71)