****THIS BOOK IS COMPLETED!**** Dipper and Mabel discover the parallel universe where they're the villains--and they emprisoned Bill's blue brother, Will. They have to defeat the opposite twins and defeat Bill who has influenced most of the opposite twin's behaviors. Cover credits to inuneechan on DeviantArt (a Grace or a Pines) I do not own these characters. I do not own the artwork on my cover. I do not own The Mystery Shack or Gravity Falls. I own this story line. Please vote and enjoy! :]
17 parts