Just got an email from Retro Gamer. Looks like the Amiga Book is being re-run again:
Ever since our Amiga bookazine was published in December we've been inundated with requests for it to be reprinted. We're delighted to say that a brand new revised version of our popular book is currently available to preorder from the Imagineshop.
These were like unicorn poo previously, so, hopefully, more of us will have a chance to get hold of copies.
If I see any locally then I'll snap them up again, just in case anyone can't get hold of them.