Much has been written about the rich history of Nauvoo and Hancock County, Illinois, and the Mormon experience there from 1839 to 1846. This comprehensive family history reference book describes hundreds of genealogical and historical resources for Nauvoo, Hancock County, and west-central Illinois. It includes descriptions of original records, primary and secondary sources, computer databases, finding aids, guides, websites, indexes, manuscript collections, newspapers, oral histories, historical and genealogical periodicals, library collections, and much more. It also includes an extensive bibliography of genealogical, local history, and historical resources. This research guide will benefit archivists, family historians, genealogists, historians, reference librarians, and others who study Illinois genealogy and local Latter-day Saint history.