This informative book, titled “Hostile Skies: A Combat History of Air Services in World War I” by James J. Hudson and Mabel E. Hudson, sheds light on the history of World War I from an aerial perspective. The book covers the role of the American Air Service during the war and provides an in-depth account of the air battles that took place during that time. The paperback copy of this book, published by Syracuse University Press in 1996, has a length of 9 inches, a width of 6 inches, and a height of 0.9 inches, weighing 20 ounces. It comprises of 354 pages and is written in the English language. The book falls under the category of textbooks and education & reference and is an excellent addition to the collection of any history enthusiast.