It was created by charter in 1948 to "provide quality educational products and services to the visitors to America's national parks and other public trusts.

This book was sold at Abraham Lincoln Birthplace National Historic Site.

[1] EN publishes approximately 100 new products for the National Park Service each year.

Founded in 1947, EN provides critical funding and support for educational and interpretive programs in America's national parks and other public trusts.

[5] The passport program has developed a following, including the creation of the non-profit National Park Travelers Club.