L-Space, short for Library Space, is a concept from the Discworld, by Sir Terry Pratchett, that sufficient quantities of knowledge have a disruptive effect on the supposedly stability of reality.
Simply put, in a Library, you can enter into the spaces between the books and travel through the stacks, exiting out to another Library elsewhere.
It’s probably easier in larger Libraries, or Libraries where it is easier to relax and wander in a bit of a daze, letting your subconscious guide you into the spaces between.
I have decided that I will be codifying this as a universal concept, and applying it to any and all RPGs that I run. Same as other universal concepts, like gravity. What will that mean for my players? Well, play a game with me and find out.
The be considered a Library, there needs to be a quantity of books, that someone has considers a wealth of knowledge. The more people who consider it thus, and the more recently, then perhaps the easier it will be to reach.
The spaces between the books are likely not without their inhabitants, most likely those who have come from other places that the books can reach. Given the potential variance in entrances and the requirements for access, it is likely that these will have only a respect for books in common.
I suspect I’ll add to this as more details come up and should be included.