Von Neumann's War

Somebody was testing a planet-killing weapon on Mars—
and the next target was Earth

Mars is the staging ground. Earth is the target. A storm of invasion gathers as the Red Planet pales and Earth scientists – amateurs and professionals alike – race to discover what it portends. Worse news: the horde of self-replicating probes suspected as the cause – implacable and all-consuming in its own right – may be only the tip of a full-scale assault.

Ideas — the only useful weapon when facing an adversa...