"
Singleton" and "Oracle" are set in the same universe as Egan's novel ''
Schild's Ladder'' from 2002, but 20,000 years earlier. "Riding the Crocodile" is set in the same universe as Egan's novel
Incandescence from 2008, but 300,000 years prior. None of the short stories is part of the novels. Between the release of both novels, Egan was active in campaigning for refugee rights, mainly including the end of mandatory detention for asylum seekers in Australia, for a few years. In an interview with
David Conyers for
Virtual Worlds and Imagined Futures in 2009, Egan called it an "eye-opening experience to see people mistreated in that way", revealing that "Lost Continent" about a time traveler seeking asylum but facing bureaucratic incompetence is "an allegory of the whole thing, just to get some of the anger out of my system and move on." == Reception ==