Weird how I found this post that is just days old... I was just thinking of that issue that was entirely Pencil Puzzles, but can't find any evidence of it existing so I thought I was imagining it too. Pretty sure the main color of the cover was brown. I can't find any images online or even on the back catalog list in the codebooks that I have. I just spent over 4 hours going through my entire ~5000 book/magazine collection and haven't found it. I am 100% certain I didn't get rid of it though. It is one of the last books I would ever get rid of. May have possibly lost it at a friend's house, I noticed my 2006 zombie edition codebook is missing too. Just gonna give up the search and hope someone else might have it.