Who is the author of national park service?

The National Park Service is a government agency, not a book or piece of literature. Therefore, it doesn't have a single author.

The National Park Service was established by Congress in 1916 with the signing of the Organic Act. This act created the National Park Service and outlined its mission to preserve and protect natural and historical resources for the enjoyment of future generations.

While the Organic Act was authored by a committee in Congress, it is the collective effort of many people who advocated for the creation of the National Park Service and its mission that led to its establishment.