Gravity Falls

You may recall a show that Disney started back June 15 2012, Then the show stop on May 31 2014 there may be reasons why they did this or maybe there planing to make the next season by calling it Gravity falls Case files you may rember these guys:

Dipper,Mabel,Grunkle Stan,Soos, and Wendy

Well 5 out five did the mystery solving but what is Grunkle not telling them

Like on the first Episode we see him open this:

But we all know there are only three books

So book 1 belong to Mr. Pines but book 2 was Gideon's and we all know book 3

was Dippers but at the end of the season Grunkle Stan take's Mabel and Dipper

in that secret room then he placed all three books by each other then this happens:

He tells Dipper and Mabel to stay back but maybe whats going to happen is there is a forth book. Cause on the last episode if you look in the machine there's a slot that has a 4 on it aka a forth book.