Booklets are a collection of individual comic strips by one user that are either part of an overall story that are tied together (like a comic book) or the user feels belong together. Booklets can only be created by the user who created the comic strips: one cannot create booklets from other people's comic strips.
As a user's status increases, so does the amount of comic strips a user can put into their booklet. When starting out, a user can have 12 strips in a booklet, but the maximum comic strips a user can have in a booklet is 30, which is the limit when they reach God status.
Booklets were first introduced on March 3rd, 2011.