/second that book, one of the best on US aviation history and engineering.
Also iirc, ironically the technique for shaping the F-117 to reflect away radar came from a Soviet journal article on shaping nosecones to minimize their interference on radar emanating from them.
Another fun thing is that claims about no computers being used for A-12/SR-71 are mostly boasting possibly to avoid mentioning then black project details, like CIA buying a custom computer (PDP-2) to do calculations on A-12 shape.
Also iirc, ironically the technique for shaping the F-117 to reflect away radar came from a Soviet journal article on shaping nosecones to minimize their interference on radar emanating from them.