This is a tight volume describing and decrying some of the ways we misuse technology, specifically mathematical models. O’Neil has both the academic and industry experience to give us a clear picture of what’s going on and why it’s terrible. And it is terrible. She wastes no time explaining models and their misuse, where they are being misused, and what it is costing us. This is a concise and thorough account, and there’s little more to say. The only criticism I will raise is the title. Calling these misused models “Weapons of Math Destruction” or “WMDs” is obviously easily confused with the other kind of WMD, and it is a clumsy name in both cases. Naming things is hard, but writing books is harder, and O’Neil can be forgiven the awkward name for she has written an important book.