Love Square?! (a Gravity Falls fanfic)
This is a xreader book! (Y/n) is visiting Gravity Falls for the summer to stay with her parents's friend, Grunkle Stan. She meets the Mabel, Dipper, Bill, and Gideon. All of them realize that there is something different about (y/n) as soon as they first see her. Which causes Dipper, Bill, and Gideon to fall in love...