Eric Flint

A cosmic accident has shifted a modern West Virginia town back through time and space to land it and its twentieth-century technology in Germany in the middle of the Thirty Years War. History must take a new course as American freedom and democracy battle against the squabbling despots of seventeenth-century Europe.

Shackled under the alien tyranny of the Jao, Earth is now threatened by the Ekhat, who are sending a genocidal extermination fleet to the solar system, and the planet's only hope lies in a young Jao prince and a young human woman brought up among the Jao conquerers. Reprint.

Captain Mark Stephens was overseeing the change of shifts at the state of Illinois' maximum-security prison when the world outside was suddenly ripped. They thought it was an earthquake until they found that the Mississippi river had disappeared.