User blog comment:SayuriDarling/Full first chapter of The Mark of Athena/@comment-3415395-20120630082502/@comment-3146930-20120630175216

I also think she will appear in later books. I mean RR didn't try to hide the fact that Nemesis and Tempast will make an appearence in The Mark of Athena, but simply said that Calypso will appear later.