ABSTRACT
This chapter explains how transmedial worlds extend beyond the stories in which they appear, and then looks at the history of how transmedial worlds developed, especially in the world-based franchises which are so popular in contemporary culture. It then goes on to explore how the worlds are conceived and constructed, from their origins in a particular medium to the methods used to expand them during their growth across a variety of different media, including interactive media that allow audiences to participate in the imaginary worlds depicted.
