Bill Cipher. `|

"Why would Dipper give me this... stupid book?"

You muttered in anguish as you read the third journal on the roof of the Mystery Shack. The only thing illuminating the pages of the creepy book was the moonlight. Until you heard a creepy laugh coming from around you and the things around you slowly lost their color
"Well, well, well, well! What do we have here?"

The voice boomed and suddenly a yellow triangle with one eye, no mouth, a top hat and a bow tie appeared.