It's not the second edition. It's the same book with a new dustcover for promotional use by Zenith.
There's a picture if it from the side on Zenith's Facebook page (it was on a coffee table during an event awhile back). I thought it was a new book until I was shown proof otherwise.
I had heard from reliable source at Zenith that they were planning a new book for their upcoming anniversary. But things may have changed in the last few months