I've got the shop theory book. I think it is still pretty handy for a home shop since it covers a lot of "obsolete" hand tools that can still be handy but training on their use is now only found in old books.
The story behind the trade school is interesting. The school began in 1916 and ran until 1952. Providing skilled labor to the Ford Motor Company was certainly an aspect to starting the school, students even providing cheap labor to Ford as part of their education. The second half of that story sounds like revisionist anti Henry Ford history. Henry Ford had been dead for nearly a decade when the trade school was closed.
The official history sounds far more plausible to me, simply by the 1950s there wasn't the shortage of machinists and engineers that existed in the 1910s. Plus how stupid would Ford have had to be to take 35 years to realize he was also providing workers to his competitors.
The grounds, facilities and equipment of the trade school was donated to the city of Dearborn and has become the Henry Ford Community College which is still operating.
Henry Ford Trade School article from the Ford Motor Company newsletter (admittedly not an unbiased source, but information on the school is somewhat scarce).