in Prince Lestat we are introduced to the ghosts of Former Vampires, Including Lestat's maker Magnus.  However, in Memnoch the Devil, Lestat goes to both Heaven and Hell, failing to find his lover Nicki.  Does that mean that Nicki is potentially a ghost we just haven't seen yet?  Any thoughts?  I'm writing a fanfic that approaches the "what if like Claudia, Nicki had unfinished business with Lestat so he also became a ghost?" subject.