The Hellfire Rebellion — Simon Hawke

A demon straight from Hell....For a moment, they saw nothing. Then they heard the rapid beat of iron-shod hooves on cobblestones. A black-clad rider with a long, billowing cloak came hurtling at them from the shadows. He turned, reining in sharply, and the handsome, jet black stallion reared up, its forelegs pawing at the sky as the rider's screeching laughter filled the air. He had no head. Boston, 1765. Sam Adams leads the Sons of Liberty as they agitate in favor of independence for the Thirteen Colonies. But something has gone very wrong with history. A terrifying, ghostly entity is galloping the streets of Boston in the dead of night, targeting rebels for assassination. And if he - or it - cannot be stopped, the Revolutionary War might never happen.The Time Commandos from the 27th Century have to travel back into the past to find a phantom, and the only man they have to guide them is an enemy soldier from a parallel timeline, who might never get back home if he doesn't help the people he's at war with. But if the headless horseman isn't stopped, there may be no going home for anyone ... ever again.