Andreas Witzel and Herwig Reiter present the first English book about this popular and widely recognized method and introduce it to the international research community. The comprehensive and hands-on introduction to methodology, principles and practice of this particular technique is organized along the logical steps of preparing, doing and processing PCIs. The authors use many practical examples from their own problem-centered research to illustrate each stage as well as common interviewing pitfalls and errors. The Problem-Centred Interview also demonstrates how to work with sensitizing prior knowledge in the context of interview research.