Thanks for your interest. My progress on the second edition was rather hampered by taking on a full-time client :-) But I'm still making progress and my current target is to have the e-book version available by the time I give my Zoom talk about the book in about a month - lu.ma/3b8ekn8y

The sad bit of this is that in the mid-70s, when "Space 1999" was being made, it seemed entirely likely that there could be a base on the moon in about 25 years.