Picked up from the book swap shelf.

When a Muslim cleric predicts planes will fall from the sky, America braces for a terrorist attack. But when the prediction proves true, the real cause is far more terrifying: a microbe that eats oil, effectively destroying all gas-operated mechanisms. Gillette, an epidemiologist at the Centers for Disease Control, understands the devastation that the microbe could wreak. But his far-more-chilling theory is that the microbe is synthetic and the work of terrorists. When no one will listen, Gillette must take it upon himself to stop the epidemic only he can foresee. As the world's economy grinds to a crashing halt, Gillette races against the clock to find the source of the microbe and its antidote.

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I saw the sentence on the front cover: "A plague that will plunge the world into a dark age..." and I was hooked. Any post-apocalyptic, dystopia, pandemic novel is automatically on the top of my list. So thrilled to dig into this one.