A very informative - perhaps at times too informative - book about the challenges that voice assistants pose for privacy and inequality (e.g., through discriminatory practices they can advance).
It is unclear who the intended audience is. It would be important to have this kind of a book for general readership, but at times the book gets into too much detail for that. Yes, it's important to have some of the historical background documented, but it's doubtful most readers concerned about voice assistants' current social implications will want that material at the level of detail this book offers. But it is also not a scientific book since there does not seem to be any original research, it is more of a summary of the state of affairs. The author occasionally refers to having conducted interviews, but there is no material that discusses this. (I listened to the audio, I wonder if the book has an appendix with methodological information somewhere that was not included.) Ultimately, neither the audience nor the genre is clear, which is a bit confusing.
The book offers important context for just how much information voice assistants collect about users of such devices, which at this point is most people given the ubiquity of such devices. That is, even if you don't use them directly (e.g., don't own a home voice assistant), chances are some friends you visit do and then your voice gets captured there. Importantly, when you call a service, their "this call is recorded for quality assurance" encompasses their right to use your voice for technical training purposes so it's extremely hard to opt out entirely. The book offers helpful policy suggestions at the end although these are unlikely to materialize especially in the US.