Very interesting. Those are some cool old coins for sure. I read a story a while ago where the rock of Gibraltar was actually a spaceship. It was a pretty good series of books now that I think back about it.
Thanks! I don't think I've read any of those. Then again I don't read as much now as I used too, and when I do it's not usually physical books. In a way that's kind of a shame, books are becoming mostly e-books now.
I read the series on my Kindle app. It's pretty much the only way I absorb content these days is either on my computer or my phone. I do have a physical book I am getting ready to read though.