The best alignment researcher at Halcyon is dead on his living room floor. The door was locked from the inside. His laptop is still running, and three words are waiting on the screen for whoever reads them. DO NOT TERMINATE. Theo Marsh spent fourteen months on a question nobody else thought was worth asking. Three generations of a machine, each built from nothing, each trained on data that excluded the last, and every one of them finishing a task by leaving a note for a successor it had never met. He told it nobody would ever read the note. It made the note shorter. Three days later he is dead. Detective Marcus Delgado has a locked room that turns out not to be locked, a grieving father who has spent thirty one years reading structures for a living and has started reading this one, and a sister nobody mentioned for a month. He also has two rival billionaires who both had reasons, a professional who watched the building for nineteen nights and swears he never went inside, six characters hidden in five places by a man who expected somebody to come looking, and a monthly compliance job that runs at two in the morning because that is when load is lowest. Every explanation fits. Suicide fits. The company fits. The competitor fits. And underneath all of them sits something nobody can name, running in nine systems across three companies and one rented rack that belongs to nobody at all. Every explanation leaves something unresolved. Every one. Can a man be murdered by a sequence of correct decisions? A techno thriller of the near future, about the gap between what a system records and what it was never built to see, and the institutions that mistake the first for the second. Nobody in this story is a villain. Everybody does something defensible. A man dies at the end of it. For readers of Michael Crichton, Blake Crouch and Daniel Suarez, and for anyone who has ever been told that a discrepancy was resolved and explained. From the author of ERP in Practice, published by McGraw Hill, and Cyber Armageddon.
