This is way too many fields for me to believe the author has expertise in all of them. This could be narrowed, or I could just read the author bio and decide on her ethos for myself. It does add applicability to a wider audience, though.

This is definitely taking more of an anthropological than a scientific bent. I see how that's appealing, but I was expecting a much more technical perspective.

It makes sense that an object book about x-rays would focus on our relationship to them. Medical procedures and devices are both terrifying and intimate, and that prompts us to form an emotional relationship with an object - and also view it through that lens.

This is a stretch. I thin x-rays moreso convey certainty, or perhaps surveillance.

I think this is a typo. A tryptich is a work of art divided in three sections, but tryptic refers to the qualities of a pancreatic enzyme.

Very generic word choice. Could also lend itself to fearmongering - people receive safe doses of radiation during an x-ray, but emphasizing their power could intstall or worsen anxiety in people who already have concerns.

A cool final sentence, but we aren't really given anything leading up to it, which makes it seem dramatic and possibly even unfounded. This description in general should be built out. At present it seems to be relying on the author's personal experience to compel the reader.

Cool tie-in. I wonder if this is going to discuss international sports to any degree - the privileges of professional athletes, international politics and their interventions, etc. The recent Olympics and a number of international conflicts have made this topic particularly pressing, and the book was even published recently enough that it may be featured.

Immediately gets into the author's ethos, which I actually was not posed to question whatsoever. I'm not looking for credentials in a book about pools nearly as much as I would be in a book about DNA or space. However, it does add a level of intimacy - this is clearly a person who has spent a lot of time in this environment.

This description is not nearly as detailed as the others. Role as what? I would love a list here to get more of an idea on what he's going to discuss in the book.

More of a playful tone, helps relax the very serious and rigid first part of the sentence.

This description is extremely strong and evocative in its style. Borrowing from Southern Gothic, Jazz (again), descriptive imagery, and rhetorical questions really takes a turn from the big goofy saxophone on the cover.

Emphasizing her father promises the readers a character - more attractive to primarily fiction readers? Also adds drama. No one is looking for unexpected deaths in a book about saxophones.

Again, reinforcing its relationship to Jazz history. It holds a similar position to the saxophone in the sphere of music genres.

This is for sure hyperbole. It's marginally more acceptable here, because I know this description is trying to get people to buy the book, but I do hope that this generalization is at least amended in the book. I know for sure the kazoo is widely excluded from symphonies and orchestras.

A good oscillation to demonstrate that, while the saxophone does not have any ties to legitimacy, it absolutely does to any source of popularity.

To me, this indicates that the book is going to spend some time in the American South. These types of nicknames and metaphors are absolutely of the dialect, and I am well aware that the South has a fraught history with Jazz.

Excellent word choice. This implies it to be foundational, not presently eminent, which I understand to be more historically accurate.

A very strong tie-in to the word choice for the book title. Again, it's blue jeans, not just jeans. This is also an excellent indicator that the book will globalize its discussion, which I commented on earlier with regard to its specifically American bent.

Are jeans transitioning out of this role? I think more of luxury loungewear in this position, especially in reference to the last decade. Celebrities in their "day off" paparazzi looks don't wear jeans, they wear leggings and sweatpants.

There's actually a very interesting story about a pair of 19th century jeans found inside of a mine in NM selling for more than $87,000!

This is a bit clunky to me. I feel like it would work better as a signifier [of] some global or far-reaching trait, like signifying the wearer as a member of a community or having a characteristic.

Japanese denim is also extremely popular in the US and abroad. I wonder if that's covered?

Also interesting phrasing here. Exercise suggests agency, or at minimum a high level of intent.

I like that this is specified. "Jeans" would serve the same function, but "blue jeans" is both a more dated name and refers to a more traditional style/color/cut of jeans.