Back in the early 1970s I studied with the witnesses ( my in-laws) and gave me a copy if what was called, "The Truth Book." It is an interesting book within itself. And the very next chapter, chapter 2, Why is it wise to Examine your religion, was my favorite chapter.
So when I began to examine the Watchtower, they(my in-laws) became very upset. They told me I had no right to question their religion. So when I pointed out what the chapter was about, I never studied with them again. They refused to.
It was released in 1968..the same year the Watchtower came out with it's watchtower magAZINE WHICH WAS TITLED, "Why are you looking towards 1975?"
I still have the copy of, "The Truth that leads to Eternal Life."