You can order the search by date and add quotes to refine the results, that helps. In many places the reviews are comments in other posts not a dedicated topic, so you have to browse through. Books like this tend to get a bit of focused attention when they are newly published, and after that become mentions.
Like this one:
As opposed to a titled topic:
The thing is, many of these people are no longer posting, and would not repeat themselves if they were, so if you don’t go and look at what was written at the time when the book was newly out, you’ll just miss these opinions.