 After Piper's death, three additional books have been written based in this universe.The Proto Aryan Sector had the Aryan migration occur 1500 years later than in our sector, where the presence of established Sumerian and Nile civilizations inhibited their migration.Near our timeline are timelines where there was a Second War Between the States, as well as a band where racial-based fascism rules North America as a result of a Nazi victory in 1940.