Council of fire

"The passage of Halley's Comet in 1759 is catastrophic. The comet appears to strike the Earth, sundering the New World from the Old. A chain of mountains rises in the Mid-Atlantic. No ship from the Old World arrives in America. No ship from the New World can find a passage to the Old--and most who try simply disappear. The comet has also unleashed magic forces, which soon spread everywhere. Slaves begin using powers derived from African witchcraf...