Von Neumann's War Books in Order

Von Neumann’s War is a stand-alone collaboration between John Ringo and Travis S. Taylor built around a nightmare idea from real-world math: self-replicating “von Neumann” probes. In the novel, strange structures on Mars turn out to be the work of such machines, and by the time humanity understands the threat, it is already spreading.

The invaders are not evil in any human sense. They are autonomous, boomerang-shaped harvesters that consume metal, refine it, and build more copies of themselves. Unfortunately, their indifference to biology means that cities, vehicles, and even people wearing jewelry become targets.

Ringo and Taylor follow soldiers, engineers, and scientists as they try to turn a hopeless-feeling situation into a fighting chance. That means jury-rigged weapons, desperate re-tasking of space hardware, and a lot of creative thinking about how to trick something that cannot be reasoned with but will always follow its programming.

For readers, the book sits somewhere between invasion story and problem-solving hard SF. It leans into both authors’ love of hardware and tactics while asking what it would really take to stop a machine apocalypse once it is already under way.