As other reviewers have noted, this is probably the single best reference on space-based reconnaissance and espionage ever published. The biggest flaw, for today's readers, is that it's now over 25 years old, and there's been an explosion in reconnaissance technology since it was published- we're now in the age of stealth, drones and computing technology that can increase the resolution of photos taken thorugh the distortions of the atmosphere by an order of magnitude. Also missing- through no fault of the author's- is the revelations made public after the fall of the USSR in 1991. For a brief period Western researchers were given full access to projects like the Soviet military space stations (which were armed with 23mm automatic cannon), and the Soviet Almaz radar satellites.
This is nonetheless an excellent reference on the history of aerial reconnaissance from its beginnings in the balloon age to just before the end of the cold war. It's exciting reading, too. A must-have for all aerospace fans. (Readers looking for a more recent update might check out Secret Projects: Military Space Technology by Bill Rose.)


