If you have never read anything about DEI before, then this might be a decent starting point. But if you are fairly familiar with the concepts, then you probably won't gain much from this book.
Overall, it was a bit more narrow and simplistic than I would have liked. The vast majority of the content is accurate and useful and true. But most of it was stuff that I was already familiar with and that I view as pretty elementary (Such as how to apologize, or admonishments to not engage in greenwashing).
It was fairly narrow in the sense that it was very US-centric, and it also seemed to mainly be applicable to large tech type firms. The section on remote work is not applicable to lots of work contexts (preschool teachers, farm work, truck drivers, etc.), and much of the advice isn't very applicable to smaller organizations. It felt like she was painting with too broad of a brush. In a certain sense, I am sympathetic: books need to compress complex ideas down into digestible tidbits, and if I paid the author as a consultant I am confident that she would adapt these ideas to the local circumstances.
I do object to using the term ‘Cross‐Cultural Relationships’ to describe friendships between two Americans of different races. It conflates race with culture. While there certainly are differences (on average) in values, behaviors, expectations, and so on between Americans of racial group A and racial group B, those are a result of culture, not of race. Simplistically: take a baby from racial group A immediately after birth and have it raised by parents of racial group B in a group B community, and that baby's culture (behaviors, beliefs, assumptions, etc.) will reflect culture B rather than culture A.
Some of the ideas contained in the book strike me as a bit too simplified. Maybe that is the just level that most people need? Such as the part about “a limited pool of black talent.” The author positions this as a bad thing, but my thought was “of course it is limited. Anything that isn’t infinite is limited. Human talent is limited.” With the pipeline issue, the author seemed to imply that companies who claim pipeline issues aren’t genuine. That might be true in some cases, but there are also scenarios in which candidates of some demographic groups are more rare for reasons that the company can't realistically influence. If you are hiring computer engineers, then you can post your job adds to Society of Women Engineers or to Blacks In Technology. But if you are hiring for something more rare, such as Japanese-French translators or Americans with expertise in Chinese human rights, there aren't analogous sources. Is there a network for hiring queer forklift drivers? In a sense, she chose the easiest example in focusing on engineers.
Some parts of this book seem to embrace what critiques of DEI love to tease us about: that the fight for social justice is mainly about using the right words. The author advises us to avoid the term “Underrepresented Minorities” and instead to use “Historically Marginalized Communities.” Some of the content in the Remember That Language Matters section struck me as overly policing people’s identity. The phrasing that your ancestors must have come from "one of these regions" to be Latino didn’t sit quite right with me. I would probably look askew at someone if they claimed to be Latino while having 100% Germanic heritage, but I’m not quite comfortable with drawing a strict boundry. What about my Brazilian friend whose ancestors came from China? She grew up in Brazil, speaks Portuguese as a native language, and has a Brazilian passport, but this author wouldn’t consider her Latina according to the rules laid out. Overall, I think that this is conflating blood/genetics/ancestry with the sloppy mishmash of culture.