I wonder whether the book says anything about how the fans at the time regarded expansion. I remember my own reaction well: don't mess with our league. I loved what is now referred to as the "Original Six," the great rivalries, the competition among players to become one of the 100 (actually a few more) who played hockey at the top level, the quality of the play. I guess most people dislike change when it affects that which they love the most. Anyway, some of my fears were realized.
In the third expansion season, we ended up with a debacle as the five vastly superior teams from the Original Six era were bunched together at the top of the Eastern division, separated by only seven points, with one of them, the defending champion Montreal Canadiens, failing to make the playoffs even though it had more points than any of the four Western teams that made the playoffs and at least 28 points more than all but one team in the Western Division. And the decline of the quality of play became evident as inflated scoring became the norm.
I recognize my take was a selfish one. The league needed expansion, although I think it could have been done much better had it been accomplished more gradually.
I had no idea that an entire book has been published on the 1967-68 expansion! From the reviews, it is obvious that this is a very well-researched and very well-written book. Count me as one who will be ordering this from Amazon