A breathtaking exploration of memory and what it means to be human, Recursion is the follow-up novel to the smash-hit thriller, Dark Matter, by Blake Crouch. 'Recursion takes mind-twisting premises and embeds them in a deeply emotional story about time and loss and grief and most of all, the glory of the human heart' - Gregg Hurwitz, author of Orphan X At first, it looks like a disease. An epidemic that spreads through no known means, driving its victims mad with memories of a life they never lived. But the force that’s sweeping the world is no pathogen. It’s just the first shockwave, unleashed by a stunning discovery – and what’s in jeopardy is not just our minds. In New York City, Detective Barry Sutton is closing in on the truth – and in a remote laboratory, neuroscientist Helena Smith is unaware that she alone holds the key to this mystery . . . and the tools for fighting back. Together, Barry and Helena will have to confront their enemy – before they, and the world, are trapped in a loop of ever-growing chaos.