The White Book of Sarnen (German: Weisses Buch von Sarnen) is a collection of medieval manuscripts compiled in the late 15th century by Hans Schriber, state secretary (Landschreiber) in the Swiss Confederation canton Obwalden. This volume, 258 pages in length, was given its name because of the white parchment in which it is bound. The White Book of Sarnen contains the earliest surviving reference to the Swiss national hero William Tell.