Board Thread:News and Announcements/@comment-25762639-20150402075256/@comment-25762639-20150403230525

I'm wiling to bet that the 'Author' is not Dipper and Mabel's grandfather - that would be the third brother. Of course, because The Author has been missing for at least 30 years, the twins wouldn't have known him at all, but surely a kid has to be interested in their grandparents. Why did they never ask Grunkle Stan what happened to their grandfather? Because the Author is not their grandfather.