What a super fun technical romp through a whole swath of our world!
There was a loose organization into categories, but the book was definitely friendly to casual flipping through. I, however, read it straight through and really enjoyed all the stuff I learned. I actually got goose bumps in the moment I fully comprehended the elegance and genius of the centrifugal clutch. The whole book had moments like that for me and I'm certain that no matter how you come at it, there'll be one or two little items that blow your mind.
I found that the computer and the internet sections were sometimes glossing over necessary details, but I don't know if that was an actual weakness of the book or if it was just because I understand electronics less well. Maybe the description of how helicopters work, which blew my mind and which I found to be very clear would leave someone else wanting more.
I can say the two-stroke engine was not possible to understand with the given description and illustration- I had to consult an outside source. The reason I mention this is because it was a problem with several of the illustrations. Sometimes they could have been more specific, to scale, or heavily labelled. Sometimes the parts named in the text did not exactly match up with the labels of the diagrams. Sometimes the connections between parts of the illustrations were not clear- like the flow of colder and hotter air in the refrigeration and air conditioning sections.
I mention these weaknesses not to discourage you from the book, but rather to encourage you to consult outside sources from time to time when reading this book. This book is actually kind of a must read, as there is no other book quite like it on the market. This book really generally lays out all the major technological concepts that make up our world. Looking around my room now, I see a bunch of technologies- computer, sound, electricity, light, pens, cds, a phone and etc. most of which were explained in this book (or which can be understood using some other example in this book)
In fact, if this had included weaving, metal-casting, glass making, and paper making, it would be almost a complete technological sketch of our civilization.
That sketch concept is something I'd like to expand upon a little. This book was not a book of blueprints and instructions, nor was it meant to be. It was supposed to be at a level of complexity somewhere between knowing an object exists and knowing exactly how to make it. It was a really wonderful line they chose- general principles just broad and shallow enough for the layperson, but deep and specific enough that you could have a good idea of how it works and what kinds of things you still don't know about how the system works.
Like in the section about computers, I understood what a byte and a bit were, and I understood the way a computer allots its resources, but I don't know exactly how to tell a computer how to use these bytes and bits to do stuff. But I do understand that's a hole in my knowledge. I understand how systems use modulation of radio waves to send data, but I do not actually know how those modulations are decoded. Etc. Etc.
But I don't feel bad about these holes in my knowledge. I feel humbled and awed by all the awesome shit that exists and that some people out there understand enough to hold it all in their heads and make it. I fell gratitude towards the inventors who came before me and I feel like I understand the general shape of technology better. No one person knows everything about how all this junk runs, but any person could learn the general principles behind any of it. And every person probably should- after all this is a democracy and a lot of tough decisions we face are predicate on understanding what the hell we're talking about.
The entire book was written in a conversational tone with a "Hey isn't this stuff neat!" bias. It's not beyond anybody, but it's full of stuff not everybody knows. What a great niche.