After two decades influencing some of the world’s most powerful people through blogging and fanfiction, writing a mainstream (if not airport) book seems unnecessary. Eliezer Yudkowsky was already one of the key figures providing the intellectual underpinnings of the artificial intelligence industry that is keeping the US economy from recession. Every breathless editorial that makes any intelligent person feel like we’re living through the cultural equivalent of a gas leak should be another victory lap. He has, however, dramatically changed his mind since he began writing in the early 2000s and published the book, If Anyone Builds It, Everyone Dies, with Nate Soares (whose contribution was to curtail Yudkowsky’s logorrhea). Now, blurbed supportively by Stephen Fry and Grimes, he thinks that artificial intelligence is going to kill us all.