3.5 stars, rounded down because her side stepping questions about intelligence and other topics wasn't entirely in good faith. She did offer a wonderful summary of the state of the research as of now. I read the book Dog is Love and this book updates beyond that, reporting on some research started at the time of the writing of Dog is Love, but not completed. She also addresses some of the weak points of Dog is Love, which I greatly appreciated, having just read it and been left with a sense that someone should correct the record. But on the other hand, she doesn't address some of the topics that readers likely pick this up for, the most glaring is dog intelligence. She makes fair points about why it's very hard to compare dog intelligence overall to another species's intelligence overall. But she doesn't speak to a range of intelligence on the specifics where it is feasible to some degree. She does a bit indirectly sometimes by pointing out various studies but they aren't put into context with reference points. She does mention when it seems dogs are unique in an area, but still doesn't associate it with childhood development. For example, she notes how it is unique that dogs ask humans for help (for example, wolves their closest ancestors will not, even after being raised in the same condition a group of dogs is raised in), but she doesn't point out at what stage a human does this, which, while maybe still not able to speak to "intelligence" would give the reader a deeper sense of what that means. Do babies do this right away or is it a skill they gain over time? The answer to that says something about dog's capacities. But overall, this is a very good overview of this topic and I highly recommend it for people who are interested in the subject but don't want to get too bogged down in the weeds or to read several academic books.