This is a book about research design. In particular, it is about research designs for projects that collect both qualitative and quantitative data, so that their combined strengths will accomplish more than would have been possible with any one method. The approach presented here is broadly interdisciplinary, because Mixed Methods Research has interested social scientists from a great many fields, including: Anthropology, Communication, Criminal Justice, Education, Evaluation, Nursing, Organizational Behavior, Psychology, Political Science, Public Administration, Public Health, Sociology, Social Work, and Urban Studies. Because this book emphasizes practical research designs, it will be most useful to practicing researchers -- including both students who intend to pursue such a career and those who already devote their energy to collecting and analyzing data. Whether you are a student or a more experienced researcher, you will learn how Mixed Methods Research gets done in the real world.