Genealogical.com is the leading–and oldest–publisher of genealogy books in the country. Under the Genealogical Publishing Company (GPC) and Clearfield Company imprints, Genealogical.com features a catalog of more than 2,000 publications, many of which–such as Val D. Greenwood’s Researcher’s Guide to American Genealogy and Elizabeth Shown Mills’ Evidence Explained–have set the standard for their fields.