Don - thanks for that. Didn't know about the book until now.
Two more I've just completed (in between fixing things that broke in the previous 24 hours ...) -
Secret Empire - the late '40s and early '50s developments in spy planes and satellites. Eisenhower and Corona, for example.
Empires of the Sky - shows how Lighter than air (dirigibles) and Heavier than air (airplanes) slugged it out for domination of intercontinental air travel in the early 20th century. What if Count von Zeppelin had never met John Steiner, in Minnesota, in 1863. What if Juan Trippe had never been a stockbroker, and bought some surplus WW1 airplanes in 1922.
Thanks.
Tom M.