The Book of Giants: The Fallen Angels and their Giant Sons (Forgotten Books)
About the Author:"Walter Bruno Henning (August 26, 1908 in Ragnit, Eastern Prussia – January 8, 1967 in Berkeley, California, United States) was a German-born scholar of Iranian history, noted for his contribution to the Middle Iranian corpus and the breadth of his interests, especially those subjects related to the wealth of archaeological discovery in the East Turkestan regions of China in the early 20th century."(Quote from wikipedia.org)