Subject encyclopedias, historical dictionaries, handbooks, and guides all provide an effective way to gather information about specific NRMS, trends in scholarship, and theoretical frameworks. The resources on this tab will help you establish believable parameters and context for your group's fictional NRM.
The Macmillian Interdisciplinary Handbooks in Religion, available online through the Gale reference collection, are also invaluable sources for helping you think about new religious movements from multiple vantage points.