Concept
You can sacrifice knowledge that you hold in order to obtain other knowledge or to transform it into items.
Questions
1. What magic related knowledge would you sacrifice and what would you ask for in return?
2. How much do you think your magic knowledge weighs?
3. Would you trade your sleight of hand knowledge in exchange for real magic? How much do you think you'd have to sacrifice in order to get some in return?
4. How does the trading happen?
World
There are no more books for sale or free internet knowledge to access. When you go to the library you get a sort of menu with titles from which you can choose one mentally and assess how much you would have to sacrifice in order to get information regarding that topic.
There are the "Superficials" who know a little bit of everything for they have sacrificed little to get little in return.
There are the "One Liners" who have sacrificed most of their accumulated knowledge to know in depth a certain subject.
There are the "Naturals" who never have to sacrifice anything in order to find out information. These guys know their way with people and how to get information from them.
There are the "Violets" who torture others into telling them all of their information regarding a subject. If the victims do not obey, the attackers beat the living shit out of them (most people shy away from physical violence, having lived so much in peace).
People can still naturally gather knowledge by going to school, classes, workshops and other already human present activities.
If it happens in each person's mind, the trading, then there should be a scientifical explanation to why it is possible. A sort of HIVE MIND that works like an app, where if you want to delete information from inside your mind or exchange information, the HIVE MIND asks you for permission before doing so and once you agree, that information which was previously inside your mind is now out of your control.
Website
The website has a database of books and already published artistic material.
The concept of the website is that you can sacrifice unique artistic material (writing, videos, songs) in exchange for other artistic material (that have been sacrificed by other users around the world). When you submit something to be sacrificed, the material is compared to the database to decide whether or not it is original.