One reviewer on Amazon says:

> This is one of the most carefully researched, extensively footnoted, beautifully written, books on this subject ever published. The sources include entries from Lindbergh's journal, Lindbergh's speeches, FBI files, letters from German archives, Ford company records, and many other primary sources. Every assertion of fact is backed up with unimpeachable documentation.

IIRC — by this point it was Ford's son running the plant(s) in question, but Henry Ford himself is not just a known anti-Semite, but quite literally ran and anti-Jewish propaganda paper in Dearborn, MI. It hardly takes a leap to look at the abysmal performance of planes built by Ford and suspect that management there was particularly … lackadaisical in their pursuit of quality.