The concept of a literature review is very much a plural rather than a singular one as there are many literatures a researcher must examine to produce a coherent literature review. For example, by doing qualitative research, the researcher is joining an ongoing debate in some shape or form. The originality of an idea, an approach, or a theoretical reinterpretation adds to existing literature. The objective of this entry is to describe the plurality of literature, to underline the difference between general and specific literatures, to highlight how to use theoretical literature as a tool to increase understanding of a subject area and test a research question or hypothesis, and to examine the methodology and data literatures that form important parts of the research process... ... Read more