Richard Dreyfuss & Harry Turtledove 
Two Georges: A Novel of an Alternate America [EPUB ebook] 

A precious and historic painting has been stolen by terrorists — radical separatists who will stop at nothing to shatter the union. Colonel Thomas Bushell, the government’s most fearless agent, is the only man who can stop them.But this is not our world. For the stolen painting depicts a treaty of peace between George Washington and King George III — a treaty that has kept America under British rule for two centuries. And the terrorists, who call themselves the "Sons of Liberty", want America to be free…