Where am I?

Johnny ghost, paranormal investigator extraordinar, has been transported to a strange place call gravity falls. After meeting 2 kids, they agree to team up and find away to get ghost back home and find out whats happening in gravity falls.every thing seems normal. But what happens when a certain yellow triangle joins the party?

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Hey guys, epic here! And yes, you read the cover correct. By epickidxxx AND lunaWolfxxx. Me and luna are making this book together, but we chose to do it on my account. So yeah, im not doing this alone, luna is doing it to! :3 also, i know! Bad description!