That isn't quite the situation we have here, if I understand correctly.
Generally speaking, the pro-WO side believes that Paul was commanding women to be silent in church, but then say that we don't have to follow his instruction today. The anti-WO side, generally speaking, instead takes the position that Paul was not prohibiting women from any sort of teaching.
Then we have three groups!
1. Those who take Paul's words literal and apply them today (Some very conservative Baptists, Hutterites, Mennonites )
2. Those who take Paul's words literal and say it was for cultural reasons.
3. Those who say Paul didn't mean it the way it reads and find another interpretation and apply that.
My point is that any person in any one of those groups could easily write a book explaining why they believe the way they do while the those in a different group would insist that it was wrong.
Regarding the makeup of Women in Ministry, I would think that if a book is represented as coming from scholars at our seminary, it would fairly represent the views of those at the seminary, and not be orchestrated in such a way that only one view is represented.
Have you read the book?
Anti-WO material was piling up and some people saw a need to counter balance the growing entrenchment.
These anti-WO were NOT fairly representing the views of the seminary, they were VERY one sided, very much orchestrated in such a way to make it seem only one view could possibly be considered as correct.
The whole purpose of the "Women in Ministry" was to explore the other side and give a good explanation from scripture and history as to why they believed differently. It was exactly an effort to help people understand that the seminary had OTHER views as well.