This book was clearly written for squarely millennial moms who are woefully overworked, and the concept of resting intentionally has never occurred to them. That's fine, there are plenty of those women out there, and I wish them well in reading this book. I personally was looking for something more thoughtful and deep, and this is written for Type A types who need a more basic primer.
I was hoping this would be more like Rest is Resistance by Tricia Hersey. It's clear the author did tons of research, but pulled very little of it into her writing, and did even less deep analysis of the research. It gets the point across, but didn't feel meaty enough. For example, when discussing why black women often find rest harder to access, she paid lip service to Hersey's movement and brought up a single anecdote of a successful black woman accused of shoplifting. While a humiliating and illustrative story, I wish Vengoechoa went just that bit deeper and more systemic in her analysis.
I'll admit that my personal bias gets in the way of this one, but this author also has a pretty serious blind spot around whether people can access rest: mental illness. She talks about caring for a partner with mental illness, which is odd because it skips over the possibility that the reader themself might struggle. Ultimately, she talks around mental illness, but it seems clear to me that her version of anxiety is brought on by the social pressures of being a middle-class to affluent working mother, and is more a social condition than a chronic one.
While that is a valid barrier to rest in and of itself, it honestly seemed like she didn't even speak to someone whose mental illness or chronic illness was a barrier in accessing rest. Conditions like OCD and generalized anxiety or panic disorders often mean people desperately want to rest, but can't. The tools she suggested, like journaling and meditation, can take the edge off, but don't address the very real struggles some people face. Anyone who's had the same very basic conversation about sleep hygiene for decades with different doctors can tell you that.
As someone who's suffered from insomnia due to anxiety my entire life, it felt very odd to me that the existence of people with insomnia or more serious sleep disorders like narcolepsy seemed to never have occurred to her. It's possible that she deliberately chose not to include them due to what a complex subject it is, but to not even pay lip service to it was disappointing. If she did and I missed it (I listened to the book on audio) I sincerely apologize.
Conversely, conditions like depression can mean people rest far more than they want to, and often feel guilty because of the lack of energy feeds into the negative self-image their disorder foments. The book operated off of the premise that of course everyone needs more rest, and discussions of having a healthy relationship with rest tended to focus on hyperproductive people who don't rest enough, not those with chronic illnesses that cause them to rest more than what is socially acceptable.
TL/DR: While this book is thoughtfully researched and well-written, it really only applies to a very narrow niche and seems to have some significant blind spots in the area of sleep and rest.