Well, Caecilius Iucundus was a real Pompeian, so it needn't be a CLC reference - although I suspect that in practice it is.

As for a book - sez who? Roman urbanism is my specialist field, so who's to say I won't publish something on responses to it some day? I've already lectured and taken seminars on the subject, and am looking forward to including both this episode and (with luck) Polanski's film in those sessions in the future.