And that they were on the march.

Somehow they had got themselves organized. Not only did they exist, but more of them had been hiding in Eastern Europe than even the most superstitious peasant could have imagined. And when the communist bloc crumbled, when all the former client states and Russia were in disarray, grabbing for land, slaughtering in the name of nation and race and religion, the undead took advantage of the power vacuum and struck.

They struck high, they struck low, and before the rest of the world could react, they controlled all Eastern Europe.

If they had merely killed, they might have been containable. But because each kill was a conversion, their numbers increased in a geometric progression. Sister Carole understood geometric progressions better than most. Hadn't she spent years demonstrating them to her chemistry class by dropping a seed crystal into a beaker of supersaturated solution? That one crystal became two, which became four, which became eight, which became sixteen, and so on. You could watch the lattices forming, slowly at first, then bridging through the solution with increasing speed until the liquid contents of the beaker became a solid crystalline mass.

That was how it had gone in Eastern Europe and Russia, then spreading into the Middle East and India, then China. And last fall, into Western Europe.

The undead became unstoppable.

All of Europe had been silent for months. Officially, at least. But a couple of the students at St. Anthony's High who had shortwave radios had told Carole of faint transmissions filtering through the transatlantic night recounting ghastly horrors all across Europe under undead rule.

But the Pope had declared there were no vampires. He'd said it, but shortly thereafter he and the Vatican had fallen silent along with the rest of the continent.