Hydrogen SonataThey are, truly, probably, the End Days for the Gzilt civilization. An ancient people, they helped set up the Culture ten thousand years earlier and were very nearly one of its founding societies, deciding not to join only at the last moment. Now they've made the collective decision to follow the well trodden path of millions of other civilizations; they are going to Sublime, elevating themselves to a new a almost infinitely more rich and complex