* AuthorOnBoard: Marsden becomes a lot more overt in the ''Ellie Chronicles'' in using his characters as mouthpieces for political and philosophical ideas, and there are lots of references to (ie recommendations of) books and poems.
* CanonSue: [[http://www.rsimpson.id.au/books/tomorrow/characters/robyn.html Some sources]] point to the fact that Robin is the most explicitly based on a real person and has a touch of being "too nice", with her flaws being largely [[InformedFlaw informed]] rather than shown.