User blog comment:Ronnoc the Hedgehog/A theory about Gravity Falls Secrets/@comment-4827910-20120721193641/@comment-67.49.22.126-20120802052546

The mystery man is the Eye of Providence (the pyramid with one eye, a hat, and a bowtie) which means the that whatches everyone in Gravity Falls; he is the one who made the hidden author hide all three books, and the one who is in every episode. Not to assume but I think it's future Gideon. It says in this site "he awfully resembles a pig," and also in this site it says there is a future episode called "The Time Travlers pig" that comes out August 24. The only thing is Soos notices strange things around this town. Maybe we should wait for more, new clues.