I left before the Isiah books came out. I think the last book study I went to was the greatest man book. That was around 1999 or so. I was basically inactive in 95 but would attend the book studies once in a while at an elder's house. It was far more enjoyable than the kingdom hall.
I was long gone by the time they canceled it, but glad for my mother, as it one less bs she has to attend.