Do you have or have you seen the 1930 English version?
Compare it to the 2007 version published by Quality Chess.
The latter is a much better translation to the original 'Mein System'
The Hays one is also far superior to the 1930 volume.
Back to Fred:
I have about 20-25 of his books, a friend of mine set out years ago
to try and collect EVERY Fred book and last count had over 60.
Then he found out that Fred had aslo written books about coin collecting,
stamp collecting, precious metals, battles, Darwin, medicine etc.
He just gave up.
Fred also wrote under the name of Edward Young and perhaps other names.
A Reinfeld hater, and there are a few about, might actually cherish
a book written by Fred but under another name.
My regret is that he never lived to see Fischer become World Champion.
Fischer-Spassky 1972 by Fred Reinfeld is perhaps one of the great
unwritten chess books.
2nd perhaps only to the '72 match written by Fischer himself.