User blog comment:PurplePenguin/The Grunkle Stan Mystery/@comment-17064782-20130831195452

Maybe Grunkle Stan, does have a twin brother, Or just a brother. I think Crazy Steve was Grunkle Stan`s brother, until he became crazy because of the books. Or Crazy Steve is just pretending to be crazy because, when Diper wanted to change his voice, Crazy Steve had the right thing for that. So maybe Stan wants to get his brother back, by traveling back in time and stopping Steve from discovering what ever made him crazy and write those books. Which is why Bill is interested in Stan. Also you should remeber in dreamscaperers Bill said "Your  a lot more clever than you look....... especially the fat one. So I`m going to let you kids off the hook, You might  come in handy later. But know this... a darkness approaches, a day will come in the future. When everything you care about will change." Note during the speech when Bill mentions the darkness he points towards the  hand that is always on the book with the number, meaning it involves the books. It might mean, Grunkle Stan opening that weird diemension thing, will release a harmfull blacklash to thetown of Gravity Falls regradless if Stan is good or not. Or maybe Stans brother was researching about Gravity Falls and it`s secrets when he disappeared beacuase in the first episode Diper reads the end of the book and it says I must stop writing because they found me or something like that.So after Stans brother disappeared, Stan discovered the first book, and has since been looking for all 3 of the books to get his brother back and complete his brothers research. Regardless of the outcome.

Sorry for any grammar mistakes I just really wanted to type this out.