Did not know that there are 2 versions of those books...
Anyway, If your looking for a manual and a "how to" I don't think you should buy those. There are great behind the scenes pictures in it but the only thing they are writing about are some background story's and how they came up with this in the script, and stuff like that but very little on how they made the suits and props.
But, they are still great books for any fan of the franchise.
I use them for references when I'm sculpting and painting.