If you're into food books, then this one is not only worth your time to read, but should be part of your library too. If you're a casual reader about the food industry, then you might find this one in too much of a niche or potentially boring.
I personally enjoyed her writing style and didn't find it academic; if anything, I was surprised by how quickly she bounced around and wondered if her colleagues might frown on the non-exhaustive presentation of the topic. So finding it stuffy or not seems to be relative to the reader based on what else they've read, but in comparison to other books from academic publishers, I felt that this one was extremely enjoyable and easy to read.
Hamilton has done a great job at presenting the evolution of orange juice, specifically in America circa 1960 until today, but what sets this book apart from the standard "look at how much processing is done to your allegedly fresh food" book, is the inclusion of excerpts and summaries of hearings that happened with the citrus industry and the FDA in the 1960s.
This trial feels like an invaluable part of the FDA history as it sets the tone for how this regulating body will manage and deal with industries for decades to come. So ignoring orange juice completely, if you're looking for a resource about the FDA, then this book provides (seemingly) a resource (6,000 pages of trial hearings) that was lost until Hamilton discovered it in an obscure citrus museum maintained by a Florida University. Sadly, as you will learn in the introduction, this resource is so scare that no one seems to have it, and worse, it may have been ruined since the publication of this book. (The university closed the museum after the curator passed, and what happened to the documents within this museum is unknown.)
As for Orange Juice, if you don't want to read the book and are only interested in the bullet points about its processing, here are the main summary points about juice that is labeled 100% fresh orange juice from Florida oranges:
Orange juice that is labeled 100%, only has to be 90% (seriously?), so your juice may contain other stuff; tangerine juice was mentioned as a supplement.
Frozen concentrate is probably only heated once, while fresh-squeezed orange juice is probably heated twice. The reason for the additional heating process is that fresh-squeezed orange juice can be stored in large tanks (due to seasonal supply and demand) and the juice is heated up prior to going into the tanks, and again when leaving the tanks for packaging. So in an ironic twist, this makes fresh-squeezed more processed than frozen concentrate (frozen is just heated once).
Heat is good because it kills any potential harmful bacteria, but bad because it breaks down and ruins the juice, so the more you heat it, the more you have to do to it to get it back to tasting like normal orange juice (or what people are accustom to believing that taste is).
Juice that is heated twice, which would be some of the most processed juice available, can be, and is, labeled "gently pasteurized." The word "gently" is extremely misleading. (Neat trivia: the word "pasteurized" has to be in a font no smaller than 50% of the size of the phrase "orange juice" on a carton; if the brand Simply Orange were to append the word "juice" to their large logo, they would either have to drastically increase the word "pasteurized" on their jug or reduce the size of their logo.)
Prior to going into orange juice tanks, the juice has to be broken down for long term storage, where, depending on the market supply and demand, it may stay for up to a year (I'm still only talking about fresh-squeezed orange juice by the way).
While it is in the tanks, it not drinkable as orange juice, since many of the components have been removed for the storage process; at this stage, it is described as sugar water.
When the orange juice is ready to come out of the tanks to be sent to market, it must first be seasoned with a flavor pack, so that it tastes like orange juice (or what consumers believe that to be).
The flavor pack is what orange juice manufactures live and die by, and is what gives certain brands their distinct flavor (e.g. Minute Maid tastes more like candy).
The flavor packs can come from flavor companies. These companies use components of the orange, such as the peel, to derive flavor and oil from the orange. Other additional components are unknown (e.g. synthetic flavoring); regulation is unknown, but seemingly non-existent. Since these are made by 3rd party companies, the orange juice manufacturer may not be able to conclusively say to the consumer (even if they wanted to) what is in their flavor pack, since the orange juice manufacturer does not have specific oversight of the development process of the pack (potentially willingly).
Although the flavor pack is supposed to only contain components from the oranges of the country/state of origin that is listed on the carton, it does not seem plausible that this is the case given that the flavor companies source oranges from all over the world. So if the orange juice says it's from Florida, it's probably deriving its flavor from components of oranges of unknown origins-most likely Brazil-but since other countries grow oranges, and since their environmental conditions (i.e. pesticide usage) are either unknown or unregulated, it additionally raises the question of what else is inadvertently in the flavor pack.
So as a consumer, when you buy a carton that only says "100% premium fresh-squeezed gently-pasteurized Florida orange juice," it could just be broken down sugar water that was stored for up to a year, heated twice with a flavor pack mixed in, and in that flavor pack are some natural elements from oranges (from all around the world-not just Florida), and, well, we're not sure what else-oh, and up to 10% of it may a completely different juice or substance.
If you're looking to buy juice that a normal person (not a committee in charge of food labeling) would classify as "100% fresh squeezed orange juice," you won't be able to based on the label. This defeats the whole purpose of the Nutrition Labeling and Education Act of 1990: to inform the consumer of what's in the box.
A company trying to minimize what consumers know is obnoxious, and hardly ground breaking journalism, still, that doesn't mean it should be ignored, and since the publication of this book, there seems to be quite a bit online about flavor packs and orange juice processing. Some companies have officially responded, some have not (or I couldn't find them).
Reading their responses in tandem with this book should allow you to make an educated decision about the product.