That's fascinating, Uncle Roger. I never had heard about that.
I remember finding Julia's one appearance in the books very odd. Was Professor Stokes in that one as well? Julia was portrayed as this jealous, shrewish harpy.
As far as I am concerned, the Ross books are promotional materials, end of story. Their relationship to the Universe of canon (the aired episodes of the 1966-71 series) does not extend beyond the recycling of a few names and the cover photos.
I realize that other fans may disagree--and that is every fan's prerogative, of course.
G.