User blog comment:Tatertot623/Evil Stan?/@comment-4554577-20130621005701

Nah I don't think he's a villain myself I also don't think he has Book 1 as I believe Robbie has it I don't think he wrote the books either Alone

My theory is that Stan was the writer of one of the books as.. the tatoo on his back reminds me of the symbol on the back of the book..

So I believe Book 3 was wrote by McGucket

Book 2/1 Wrote by Stan probably 2 since Gideon seems to know something about the shack maybe he wrote about in Book 2?

Remaining Book wrote by someone else I don't thinkng Bill wrote it as I believe Bill is try to keep Secrets of Gravity Falls Secret.