First was a wonderful travel/geography/history book about China, called The River at the Center of the World: A Journey Up the Yangtze, and Back in Chinese Time by Simon Winchester. Delightful, and recommended.
The others were both from the Osprey Men-At-Arms series of illustrated books. The first that I finished was #395: Tribes of the Iroquois Confederacy, which gave a much clearer picture to me of their history and status, which I found very interesting.
The last was #396: Medieval Scandinavian Armies (1): 1100 - 1300, a period of time following that of the Vikings, which gave me some insight into the differences of the history of the region. Not bad.