Hawk of the Wilderness (1938) is a Republic movie serial based on the Kioga adventure novels written by pulp writer William L. Chester (1907-1971). Kioga was a Tarzan-like white child raised on a lost island in the Arctic Circle, somewhere in northern Siberia, which was heated by thermal springs and unknown currents. Chester wrote four Kioga novels. The first, Hawk of the Wilderness (1935), was the one that was filmed as the 12-part 1938 Republic serial. (The other novels in the series were Kioga of the Wilderness (1936), One Against a Wilderness (1937) and Kioga of the Unknown Land (1938).