That's the same copy I have. For some reason when I re-read it, there were more details in this book than there were in the one I read as a child back in Guyana. Maybe that was an abridged version for younger readers? It's a very good book. If you like this one, try "The Wild Coast" also by Carew.
Black Midas is expensive - $20 on Amazon for a paperback. My wife got me a copy for Christmas and looks like a first edition that came from a library. I'm researching polypropylene bags for some of my collectibles.