This blue book United in Worship, was studied before baptism. In 2002 we got the updated version...was it any different? No. Only two small changes.
1980 - United in Worship-
Chapter 19- What does the Mosaic Law mean to you?
Chapter 20- Life and Blood do we treat them as sacred?
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2002- Worship the true God
Chapter 19- Continue to speak of God's Works
Chapter 20- Keep close in mind Jehovah's Day.
Why the change? If you read these two chapters they are very right-wing. The one on the Mosaic Law tells us none of the laws are binding on christians...but you should follow them anyway on principle. E.g Tattoo's, are not banned for christians but were for Jews, so you as a christian can't get one.
The chapter on blood basically says you should die rather then take blood...then you will have everlasting life. This embarrassing doctrine will not be covered in detail with baptizm candidates from now on.