Wading through a variety of items collected over the years, I have rediscovered my Dark Crystal Promo book - something I gather are not that thick on the ground. I'm interested in finding out more about it. While I see they came in two different cover colors, mine has the brown cover. As well, where descriptions of these mention a picture of a skeksis showing through the diecut on the cover, mine has a "holographic" image. Any info about this item would be appreciated. Thanks.