Have you ever come across a story set in such a wonderful universe that long after finishing the book you find yourself thinking about the worlds these story's are set in and the possibilities of how these would affect our own lives? I do! In this series I don't want to talk about the books story line, per se, but the actual mechanics or world building which carries the plot, that makes the book all that more memorable. Memorable Reads:The Long Earth Series. Stepper Box Schematics In the Long Earth Series , a device called a Stepper was made freely available over the internet, it is a box which contained some rudimentary wiring, a three-way switch, and a potato as the power source. The idea explored is that our Earth sits in one of many parallel universes and that this Stepper device allows people to step through them, sort of like moving from one card to the next in a deck of cards.