On the subject of fun nonfiction, I have to recommend "blind man's bluff"; its the best of the genre, IMO. Any others? Also, broader away from recent military

On the subject of fun nonfiction, I have to recommend "blind man's bluff"; its the best of the genre, IMO. Any others? Also, broader away from recent military skunk works is anything by Simon Singh, particularly The Code Book and Fermet's Last Theorum.