Ultimatum

A Martian walks into a Cold War office and delivers humanity an ultimatum. That's the setup, but Roger D. Aycock transforms it into something stranger and darker than that simple premise suggests. Winant, an ordinary Earthman, becomes the unwilling recipient of a warning from beyond the stars: humanity's wars and technological ambitions have attracted dangerous attention from entities that could end us all. Yardana, the alleged Martian envoy, speaks of influence already at work on Earth, of powers watching our mushroom clouds with growing concern. The tension doesn't come from action sequences but from the creeping dread of realization: what if we're already compromised? What if our salvation depends on listening to a stranger from Mars? Aycock captures the atomic age's worst fear with unsettling clarity: that we might not destroy ourselves, but that something else might do it for us. For readers who love classic paranoid sci-fi and stories where the danger is already inside the room, this is a compact, bracing nightmare.