Public desire for preservation of some of the area grew until President Franklin D. Roosevelt signed a bill creating a national park in 1938. Even after ONP was declared a park, though, illegal logging continued in the park, and political battles continue to this day over the incredibly valuable timber contained within its boundaries. Logging continues on the Olympic Peninsula, but not within the park. A book detailing the history of the fight for ONP's timber is "Olympic Battleground: The Power Politics of Timber Preservation" by Carsten Lien.