Idea
Instead of the regular money, bills are made featuring important figures of the Cardistry world. This can be used in combination with "The Cardistry Movie" or it can be adapted at Cardistry-Con, can be used as a currency between fellow cardists or just simply made into a nice illustration.
World
In this world, depending on the hobby that you have, specific things around you start transforming. If you are a violin player, you will see on your countries bills famous violin composers; if you are a magician, you will see famous magicians - and so on.
If you are a cardist, commercial street posters will feature individuals well known in the cardistry world. People on TV resemble Cardists that have pioneered the art form.
Basically, depending on the hobby you have, your see the reality around you in a different way.
In order to see what other people see, you must also be genuinely interested in what they are interested.
Story
The plot can be developed around a blind kid who walks the Earth in search of all knowledge. With this character the book can be transformed in a sort of quirky fiction manual, anyone reading the story also learning a lot of diverse information and life/art hacks.
The plot can be developed around a kid that can shift from one illusion to another, can see anything that anyone sees, ultimately tacking the question: if I can see everything and I am interested in everything, what is it that I want to do?