BTW, I still have mine and was never asked to turn it over to be destoryed; never asked to do that in regard to any book.
I once saw a John Ankerberg show where he had on an ex-jw that said that the WTS had done that with the Way To Paradise book published in 1924. Now I was still a believing jw but could see some of their points, but that one made me stop and turn off the TV. I had seen that book in my grandparents library, my aunts, and my uncle's. I saw it in the library of the congregation I attended and I found it in the library at Bethel, not hidden away but easily found using the card catalog. I will say this, many newer congregations probably did not have a copy, but not due to destruction, just lack of copies by that time.