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Kobuk the Destroyer: And Other Tales from the Wild, Unseen World of Test Engineering
A rollicking exploration of why the stuff we use (mostly) works—and a celebration of the mad genius of the engineers who ensure it does.
When a manufacturer wants to certify a product as “bear-resistant” —a cooler, a trash can, a camping food canister—they turn to the Interagency Grizzly Bear Committee and its resident panel of product-testing bears. Over the years, one bear has become infamous for his penchant for cracking locking mechanisms and crushing manufacturer dreams, but thereby helping to keep our food—and us— Kobuk the Destroyer.
From “childproof” bottle caps to the cars and planes we ride, such stories underlie the products we use every day and can generally trust to do what they say and not (unexpectedly) dump us out of the sky or blow up. As Alex Davies reveals, this amazing reliability is thanks to the mostly invisible, maniacal, yet methodical work of test engineers, who divine how everything and anything could go wrong and plan for it in advance—using rocket sleds, chicken cannons, and any means necessary. Uncovering the surprisingly profound science behind the fine print on the label, Kobuk the Destroyer is as wildly entertaining as it is illuminating.
When a manufacturer wants to certify a product as “bear-resistant” —a cooler, a trash can, a camping food canister—they turn to the Interagency Grizzly Bear Committee and its resident panel of product-testing bears. Over the years, one bear has become infamous for his penchant for cracking locking mechanisms and crushing manufacturer dreams, but thereby helping to keep our food—and us— Kobuk the Destroyer.
From “childproof” bottle caps to the cars and planes we ride, such stories underlie the products we use every day and can generally trust to do what they say and not (unexpectedly) dump us out of the sky or blow up. As Alex Davies reveals, this amazing reliability is thanks to the mostly invisible, maniacal, yet methodical work of test engineers, who divine how everything and anything could go wrong and plan for it in advance—using rocket sleds, chicken cannons, and any means necessary. Uncovering the surprisingly profound science behind the fine print on the label, Kobuk the Destroyer is as wildly entertaining as it is illuminating.
258 pages, Kindle Edition
Published September 8, 2026
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September 4, 2026Nice review at Science: https://www-science-org.wikipedialibr...
Excerpt:
" Davies makes a compelling case that test engineering—unglamorous, and largely invisible—is among the most consequential contributions to public safety and consumer trust that modern society has produced. It demands engineering rigor, creative imagination, and a particular fortitude: the willingness to envision every way a thing can go wrong, including the ways a clever or careless person might help it along, and to plan accordingly, before the world and random happenstance do the testing instead.
Kobuk the Destroyer is an entertaining, informative, and occasionally sprawling celebration of that work—and of the people, and bears, who do it."
Excerpt:
" Davies makes a compelling case that test engineering—unglamorous, and largely invisible—is among the most consequential contributions to public safety and consumer trust that modern society has produced. It demands engineering rigor, creative imagination, and a particular fortitude: the willingness to envision every way a thing can go wrong, including the ways a clever or careless person might help it along, and to plan accordingly, before the world and random happenstance do the testing instead.
Kobuk the Destroyer is an entertaining, informative, and occasionally sprawling celebration of that work—and of the people, and bears, who do it."
Review of advance copy received from NetGalley
You will look at everything around you differently once you read this book that delves into the painstaking, obsessive, and often downright bizarre world of product test engineering. You’ll learn the astonishing numbers of accidental child poisonings avoided by the development of childproof pill bottle caps, but also how those caps can’t be engineered to be so childproof that too many adults can’t open them. (And what is “too many” is a hot topic in this field.) You’re obviously familiar with the many safety features in the modern car, but did you know it was a revolutionary concept to recognize that crashes are inevitable and that crash-effect mitigation should be an engineering goal?
Airplane engineering stories are a large part of the book, including wing loads, ejection seats, engine safety during bird strikes. There are highlights, like Captain Sullenberger’s successful Hudson River landing after a birdstrike killed both his plane’s engines, but also lowlights, like Boeing’s MCAS software system in its Boeing 737MAX that worked as engineered—and caused two terrible crashes.
There are also stories about products that you might not think about when you consider product test engineering, like the “bear proof” camping containers on which the title’s Kobuk the Destroyer, a grizzly bear, is used as the ultimate tester. There are many other containers that have been developed through rigorous testing processes, like egg cartons and shipping containers, and fast-food clamshell containers.
Bringing us up to the minute, author Davies wraps things up with a discussion of how engineers try to keep AI in line, including large teams of contestants given one hour to jailbreak AI chatbots’ intended boundaries. It’s a discussion that quickly demonstrates just how hard it is to try to ensure AI works only as intended. One of my favorite examples of this is Davies’ story about the group Catholic Answers, which set up an AI “Father Justin” chatbot, which took only a few days to break its restraints and being taking confession and offering the sacraments.
While this is a fascinating and entertaining book, I was a little misled by the title into thinking it was going to be a lot heavier on the stories than it is. There is a lot of heavy-duty content here about engineering methodology and philosophy. If you’re up for that, you should enjoy the book.
Airplane engineering stories are a large part of the book, including wing loads, ejection seats, engine safety during bird strikes. There are highlights, like Captain Sullenberger’s successful Hudson River landing after a birdstrike killed both his plane’s engines, but also lowlights, like Boeing’s MCAS software system in its Boeing 737MAX that worked as engineered—and caused two terrible crashes.
There are also stories about products that you might not think about when you consider product test engineering, like the “bear proof” camping containers on which the title’s Kobuk the Destroyer, a grizzly bear, is used as the ultimate tester. There are many other containers that have been developed through rigorous testing processes, like egg cartons and shipping containers, and fast-food clamshell containers.
Bringing us up to the minute, author Davies wraps things up with a discussion of how engineers try to keep AI in line, including large teams of contestants given one hour to jailbreak AI chatbots’ intended boundaries. It’s a discussion that quickly demonstrates just how hard it is to try to ensure AI works only as intended. One of my favorite examples of this is Davies’ story about the group Catholic Answers, which set up an AI “Father Justin” chatbot, which took only a few days to break its restraints and being taking confession and offering the sacraments.
While this is a fascinating and entertaining book, I was a little misled by the title into thinking it was going to be a lot heavier on the stories than it is. There is a lot of heavy-duty content here about engineering methodology and philosophy. If you’re up for that, you should enjoy the book.
Review of advance copy received from NetGalley
What do you know about Underwriters Laboratory (UL)? Or the Interagency Grizzly Bear Committee (IGBC)? Or how jet engines are tested against bird strikes? These are just some of the groups and products that Alex Davies presents in his examination the role test engineers play in keeping us safe in so many ways!
Alex Davies opens with Kobuk the Destroyer taking part in the IGBC testing of "bear-proof" products which he uses as a leading to the rest of the book. He discusses the Limits that test engineers such as those at Underwriters Laboratory use on safes, elevators, and a host of other products. Then he delves into the never-ending chore of Fool-Proofing a product so that an ordinary person can use it with out damage to themselves or others, hopefully. The chapter entitled Disintegration highlights how Boeing tested a new model plane on the ground to see how much force it could take before the wings came off. Unfortunately, the software was not tested to the same degree. In Scale, the U.S. Army Corp of Engineers got highlighted with their scale map of the Mississippi River and Missouri River basin created to help with flood control. The Dynamics of products let loose in the wild provides real-world impacts on what happens in real life and how that affects testing. The penultimate chapter - Intention - focuses on The purpose of the product and what effect that has the testing process. Then, in the final chapter, Alex Davies takes the products into The Total Test Environment and brings all the concepts covered together.
For an enjoyable and enlightening look at the unknown world of test engineers, do pick up Alex Davies' Kobuk the Destroyer!
Thanks Netgalley and W. W. Norton for the chance to read this title!
Alex Davies opens with Kobuk the Destroyer taking part in the IGBC testing of "bear-proof" products which he uses as a leading to the rest of the book. He discusses the Limits that test engineers such as those at Underwriters Laboratory use on safes, elevators, and a host of other products. Then he delves into the never-ending chore of Fool-Proofing a product so that an ordinary person can use it with out damage to themselves or others, hopefully. The chapter entitled Disintegration highlights how Boeing tested a new model plane on the ground to see how much force it could take before the wings came off. Unfortunately, the software was not tested to the same degree. In Scale, the U.S. Army Corp of Engineers got highlighted with their scale map of the Mississippi River and Missouri River basin created to help with flood control. The Dynamics of products let loose in the wild provides real-world impacts on what happens in real life and how that affects testing. The penultimate chapter - Intention - focuses on The purpose of the product and what effect that has the testing process. Then, in the final chapter, Alex Davies takes the products into The Total Test Environment and brings all the concepts covered together.
For an enjoyable and enlightening look at the unknown world of test engineers, do pick up Alex Davies' Kobuk the Destroyer!
Thanks Netgalley and W. W. Norton for the chance to read this title!
Review of advance copy received from NetGalley
A solid 3.5 stars. This is a breezy and often funny overview of the history, theory, and practice of product testing.
I liked how the author systematically covered the six fundamental aspects of products that are tested: limits, foolproofing, disintegration, scale, dynamics, and intention. I did feel that the intention section didn’t fit into this schema as neatly as the other five concepts, and I wish that section had been fleshed out a little more. Intention (of a product) sounded like something you need to think about before and during the design process, not as aspect of a product that is later tested; I kept waiting for the author to change my mind on this but I wasn’t given enough information to do so.
The writing style was usually tongue-in-cheek and serious where it needed to be. This is a competently written book, but as is so common with popular nonfiction, I wanted a little more depth. For example, it would have been cool to include a chapter that brought all of the above concepts together to design and test a single product from start to finish.
Even as it is, this book is informative and worthwhile if you’ve ever wondered how all those complicated products magically arrive on the shelf in a relatively-unlikely-to-kill-you state.
I liked how the author systematically covered the six fundamental aspects of products that are tested: limits, foolproofing, disintegration, scale, dynamics, and intention. I did feel that the intention section didn’t fit into this schema as neatly as the other five concepts, and I wish that section had been fleshed out a little more. Intention (of a product) sounded like something you need to think about before and during the design process, not as aspect of a product that is later tested; I kept waiting for the author to change my mind on this but I wasn’t given enough information to do so.
The writing style was usually tongue-in-cheek and serious where it needed to be. This is a competently written book, but as is so common with popular nonfiction, I wanted a little more depth. For example, it would have been cool to include a chapter that brought all of the above concepts together to design and test a single product from start to finish.
Even as it is, this book is informative and worthwhile if you’ve ever wondered how all those complicated products magically arrive on the shelf in a relatively-unlikely-to-kill-you state.
Review of advance copy received from NetGalley
I received this book courtesy of NetGalley for the purpose of a fair and honest review.
Overview: How did we start with the safety tests? We know people were testing things, but how did we find out what we needed to test for? Or how to test for it? This book has the answer. How does it work? Let's find out.
Dislikes: Some of what the people test for kind of went over my head. Not all of it, mind you. The basic tests, or the history of testing, or even the testing of products meant to keep bears and wolves out of things, made a lot of sense.
Likes: There was a story about one of the higher ups in the Air Force. He put himself through hell just to keep the other pilots safe.
Conclusion: This was a great book. If you're interested in the background of safety inspections, then this book is for you. Enjoy the read.
Overview: How did we start with the safety tests? We know people were testing things, but how did we find out what we needed to test for? Or how to test for it? This book has the answer. How does it work? Let's find out.
Dislikes: Some of what the people test for kind of went over my head. Not all of it, mind you. The basic tests, or the history of testing, or even the testing of products meant to keep bears and wolves out of things, made a lot of sense.
Likes: There was a story about one of the higher ups in the Air Force. He put himself through hell just to keep the other pilots safe.
Conclusion: This was a great book. If you're interested in the background of safety inspections, then this book is for you. Enjoy the read.
Review of advance copy received from NetGalley
ARC was provided by the publisher via Netgalley in exchange for an honest review
I received a complimentary copy of this book. Opinions expressed in this review are completely my own
I certainly learn a lot from this book. A few of these tests I had heard about but most were very new to me. On the whole, I found the stories descriptive, interesting and usually humorous. I could’ve done a little less explanation of the tests as I was reading this book mainly for entertainment. However, the author has certainly done his due diligence, and it is a very well researched book. I also did not feel that it was beyond my understanding. The author did a very nice job explaining in layman’s terms.
Want to Read
September 8, 2026As heard on 99% Invisible (Kobuk the Destroyer)
https://99percentinvisible.org/?p=48496
Every product has to be tested somehow, and sometimes that means finding increasingly creative ways to break it.
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https://99percentinvisible.org/?p=48496
Review of advance copy received from NetGalley
Fascinating stories wrapped in great writing
The stories about test engineering were fascinating and while there are a lot of books about inventions, there are not a lot, in my experience, about how we know these inventions are safe. I enjoyed the writing; conversational with clever, plain-language explanations and a healthy dollop of humour and puns. Thank you to NetGalley and W. W. Norton & Company for the advance reader copy.
The stories about test engineering were fascinating and while there are a lot of books about inventions, there are not a lot, in my experience, about how we know these inventions are safe. I enjoyed the writing; conversational with clever, plain-language explanations and a healthy dollop of humour and puns. Thank you to NetGalley and W. W. Norton & Company for the advance reader copy.
Review of advance copy received from Goodreads Giveaways
I like this book very much. It is an easy read in that you do not need to have any specific background knowledge to enjoy this book. The book is written in a more converstational style as if you were sitting with the author and he is telling tales. I have learned a number of things from it and I recommend it highly. I will be recommending this book to a teaching colleague for his high school engineering class.
Review of advance copy received from Goodreads Giveaways
Interesting book on how things we use every day, big and small, and the type of tests they use to generally ensure there safety. Big props to the chicken Canon to avoid fiery deaths from above.
Review of advance copy received from Goodreads Giveaways
Kobuk the Destroyer is an interesting book about test engineering for various products.
Displaying 1 - 11 of 11 reviews