Hi Martin,

I'd like to identify the reviewers of this book. How to do this?

"Review" in this context seems to refer to technology provided by https://www.mediawiki.org/wiki/Extension:FlaggedRevs .
https://en.wikibooks.org/wiki/Help:Tracking_changes#Reviewing_pages is linked from the top of https://en.wikibooks.org/wiki/Introduction_to_Software_Engineering and allows searching.
In this case, you're looking for https://en.wikibooks.org/w/index.php?title=Special%3ALog&type=review&page=Introduction_to_Software_Engineering

(if it is not the most appropriate place to ask this question, what would be a better place?)

https://en.wikibooks.org/wiki/Wikibooks:Reading_room might offer some discussion places.