"Deftly navigating decades of methodological advancement, discussion, and debate, Mello produces a clearly written and well-reasoned guide to understanding QCA and how to conduct it effectively. Researchers from all disciplines will be well served by Qualitative Comparative Analysis: An Introduction to Research Design and Application, which teaches those new to the method how to do it well and provides a comprehensive reference for experienced QCA researchers."—Claude Rubinson, associate professor of sociology, University of Houston-Downtown

"Patrick Mello offers a thorough but approachable introduction to Qualitative Comparative Analysis (QCA). He grounds his presentation of the approach in a discussion of the QCA research cycle, offering important analytic insights for novices and experts alike. Mello also includes 'behind-the-scaffolding' infoboxes where authors of published QCA studies comment on their analytic strategies."—Charles C. Ragin, Chancellor's Professor of Sociology at the University of California, Irvine

"A diverse set of empirical illustrations, a clear presentation of QCA as a research approach, and a sharp but yet accessible hands-on presentation of QCA protocols from A to Z: this textbook is a great companion for anyone seriously engaging with QCA."—Benot Rihoux, University of Louvain and COMPASSS international network

"Mello's book especially stands out from other publications on QCA in three different areas: the chapters on research design (Chapter II), QCA and its critics (Chapter IX) and the online 'R Manual' that accompanies the publication. These elements are especially interesting given the fact they are not discussed in many texts on QCA, thus filling an additional gap in the literature on the method."—Political Studies Review