“The books Keys to Danish Research, Keys to Swedish Research, and Keys to Norwegian Research by Anita Olsen are a collection of Danish, Swedish, and Norwegian research information taken from books, practical experience, the internet, libraries, and other key sources to help you understand the early church records and vital information found in Danish, Swedish, and Norwegian records. The books include key facts, history, laws, and customs of Denmark, Swedish, and Norwegian to assist you in your research.” Links to these books are found at https://keytopast.wordpress.com/