Book excerpt: Harry Potter and the Millennials tells the fascinating story of how the team designed the study and gathered results, explains what conclusions can and cannot be drawn, and reveals the challenges social scientists face in studying political science, sociology, and mass communication. Specifically, the evidence indicates that Harry Potter fans are more open to diversity and are more politically tolerant than nonfans; fans are also less authoritarian, less likely to support the use of deadly force or torture, more politically active, and more likely to have had a negative view of the Bush administration. Furthermore, these differences do not disappear when controlling for other important predictors of these perspectives, lending support to the argument that the series indeed had an independent effect on its audience. In this clear and cogent account, Gierzynski demonstrates how social scientists develop and design research questions and studies.