User blog comment:Guezz WUT24/Rumble's Revenge Cryptograms/@comment-2232235-20130123035235/@comment-2232235-20130123050944

Meh. Just guesstimating.

At one point, I thought more volumes may have been written after book 3. Even though Dipper mentioned that the writing on the pages eventually stops, I thought that maybe it was done on purpose.