The Thursday Next series by Jasper Fforde
is mainly about literature itself, a reflection on imagination, how it works on the reader, and the way it is created. This is mixed for good measure with doses of humor and detective work, which has lead Jasper Fforde to create a complex world, which happens to have several planes of existence:
- First, the world itself where Thursday Next lives. This world is very much like our own, except it seems to have had a few different events in the past which have led to the non-creation of the URSS, the splitting of Wales from the UK, and other technological differences. However, given the fact that time travel is possible, it points in LiGB to the existence of parallel "worlds", one of which might be in our own timeline.
- Then, there's the BookWorld, composed of a central transit area very much like Borges' library (but with different buildings for each language), and the worlds created by the books themselves. This is a kind of hommage to the worldbuilding capability of writers, but it creates many different milieus where action can take place. It's also the place where books are created, out of the Well of Lost Plots
- Finally, the memory realm, which is very much inside every one's head, but which can be infected by memory viruses, and where memories can have a life of their own, and be transformed or killed. A substantial part of the action in the third book, the WoLP, takes place
Then, there are several means of transportation within each plane, and to move from one to another. But this probably reserves another post.