 "Heirs of Empire" is a stand-alone work that focuses on the adventures and travails of the fraternal twin children of Emperor Colin MacIntyre (who defeated the eponymous mutineers and the Achuultani incursion in " The Armageddon Inheritance") and their three friends.In 2003, it was republished in the omnibus volume, "Empire from the Ashes".The story opens approximately 20 years after "The Armageddon Inheritance".