Researchers who are looking for more detailed information on a particular U.S. state may choose to examine other reference works which treat that area specifically. Often such works will be referenced in the chapters of the Red Book itself.
Users should also consult the Learning Center, our growing collection of how-to information online, to find articles and helpful tips on various geographic areas in the U.S. and around the world. Ancestry.com also carries a number of state-specific reference works for sale in the online store.