Adapted from Frank Hagan's best-selling Research Methods in Criminal Justice and Criminology. This new text offers a complete introduction to qualitative and quantitative research for criminal justice, in a manageable and reader-friendly format. The text emphasizes sources and resources of classic and contemporary research in the field. Also, the text uses criminological and criminal justice studies to illustrate research methods, so students can become familiar with examples of research in the field and learn fundamental research skills.