I am a scientist, yes.

Who is Mr. Edwards? (if he's a film character, I'm
completely clueless

)
Sorry the pic. of my round one doesn't show the wrapped bits too well - again the hazard of pics over reality, but the "crossover strap" is visible between them - and the iridesence marks the v-shape on the front out.
It
is hard to tell though, particularly with it being brown.
Yes, there are a couple of errors in the book. This wrongly captioned image of a
Lollipop, and the mention of there being green glass at Mdina - but we hadn't found out how to distinguish MDG from Mdina at the time the book was written., so I presume the mention of green came from examples of MDG which had been seen, but mistaken for Mdina.
Then there is the image of
that piece (the so-called "obelisk"at the bottom of p.52 which has been doing the rounds for years - both the piece
and the image) - it's a tricorn bottle which has been ground down, for heaven's sake!
Are you aware of any others?
I don't know why Mark has put the second edition on hold, there's just an announcement on his website.