This book explains the stuff around you

Long before I became a software engineer, I thought like a civil engineer. As a kid, I’d look around my Seattle neighborhood and wonder how all those power lines, telephone cables, sewers, and water pipes worked. I still remember when the city separated its sewage and stormwater systems, a massive project that was all about improving water quality and reducing flooding.

I wish I’d had Grady Hillhouse’s book Engineering in Plain Sight back then. It takes all those mysterious structures you see every day and explains them in a way that's both entertaining and enlightening.

For instance, when you see a bunch of cables and boxes on a utility pole, do you know what each one does? I sort of did, but I understand it much better since reading this book. Hillhouse breaks it all down, explaining why there are so many different components up there and showing what each one does.

Hillhouse is a former civil engineer—he now works full-time on his YouTube channel, Practical Engineering—but you don’t need any background in the subject to appreciate the explanations in this book. He uses straightforward language and a lot of illustrations to make it all easy to understand. He explains why we have voltage step-downs on utility poles and what those mysterious backflow preventers are that you see in water systems. He also gets into the nitty-gritty of things like natural gas distribution and water systems. I was particularly fascinated by the sections on water and sewage systems.

I also appreciate how the book encourages curiosity. It’s not about becoming an expert on every piece of infrastructure you see, but about sparking that “aha” moment when you finally understand what something is and why it’s there. Personally, I’m curious about cell towers; Hillhouse explains how they work and why they’re designed the way they are, which is both interesting and reassuring.

One of the coolest aspects of Engineering in Plain Sight is how it ties everyday observations to larger engineering principles. For instance, why do some countries have big water tanks on top of houses while others don’t? It’s all about the reliability of the local water distribution system. In places with less reliable systems, those tanks ensure a steady supply of water. It’s a simple solution to a complex problem, and it’s these kinds of insights that make the book so rewarding.

The book's engaging style makes it a perfect read for the holidays. It's informative without being dry, and you can pick it and put it down without losing track of the narrative. It's the kind of book that makes you look at the world a little differently, and maybe even appreciate the engineering marvels that keep our modern lives running smoothly. This would have been a perfect holiday gift for my younger self, and I think it would be great for anyone who is similarly curious about the things that make modern life possible.