From the perspective of someone who has no real background in this subject beyond reading the translated myths, the Iliad, the Odyssey, and an occasional book/article on the subject in my spare time, this was a useful but an increasingly muddy book. The early chapters are great in showing how broad Athena's remit as a deity is, contrasting her with other deities and highlighting how often she embodies opposing values, such as a warrior figure who is also dedicated to craft and not just upholding but establishing civilization or a defiantly virginal being who can also be maternal. The confusion (or my confusion, at the very least) comes from a few different sources. Some parts of the text, particularly towards the end of the book, could use another pass from the editor to improve clarify. Another source of confusion comes from broad conclusions drawn from very slight or even non-existent evidence. In the chapter about Hephaistos, for example, a claim is made that while both he and Athena are connected to craft, Athena is highly respected and distinguished while Hephaistos is a servant of the gods and a figure of fun as a reflection of the metalworkers being essential to the Greek society but also feared and marginalized. No citations accompany this claim and so it is questionable how much it can really be trusted.
Overall, this is not a bad book but I would not say it is a particularly good entry point for someone who wants to learn either about the Greek religion as a whole or about Athena in particular. The book does have a pretty good section with recommended further reading that is split into topics. I just wish the book also had a section dedicated to the publications the author recommends reading prior to reading this book. Non-fiction, particularly titles that skew somewhat academic, often tends to assume and expect a certain baseline knowledge of the subject from the readers but does not communicate this expectation. I think many unfulfilling experiences (and poor ratings) could be avoided if writers were specific about what they expect their readers to know and perhaps even provided a list of recommended books to obtain this knowledge from.