The introduction part was promising. It has some helpful insights into the idea of negotiations. And it's not like you read the whole book while browsing the bookstore aisles, there's only enough time to cover a portion of the introduction part before you start getting dirty looks from the store managers. So you garner what you've read and then look at the reviews by people of apparent eminence praising it with adjectives like "thrilling" and a "page turner" so you take a chance and spend that hard earned money to get home or wherever you won't get any dirty looks for reading the newly purchased book that is supposed to "thrill" you to read and weep about purchasing it. 🥲
In my opinion, I'd give a 5/5 to the Introduction section. It had some well-structured arguments on what works and what doesn't, it is researched and exposes the fallacies around reductive but overused anecdotes about negotiations, and it is organized and methodical about its premise on the book which makes the book seem promising about its content. Honestly, if you are completely new to the subject you might end up with new perspectives on the subject from the introduction section.
However, when you start going beyond the introduction and deeper into the book it just ends up falling back on the structure of the generic pattern of self-help books that contains a lot of words that don't say anything with its thesis falling flat and discordant promoting conflicting ideas from chapter to chapter. The lucidity it promised in the introduction gets betrayed and lost amidst the stories that don't do much to support the author's thesis and serve the purpose of distracting the reader from the scope of discussion. In the end, you end up investing your time to gain one or two sentences of insightful ideas per thousand words or so.