The bux app uses the possibilities of digitization to create a connection between fiction and reality. The literature of a city is georeferenced - location-specific passages are located on the map. In this way the cultural and symbolic capital of a place is made visible on the city map.

Via Augmented Reality, users can individually enter the invisible stories of a city, or they are personally taken by the authors: on different routes, they lead to the sites of action and the operas of their works. They talk about room references, read text passages or pose in the virtual space with their readers. By working with the authors, the application creates an unconventional relationship between author and reader. The latter are not to remain passive consumers, but can actively participate via user-generated content - for example in the form of a literary flashmob.

The development and implementation of the bux app is supported by the Federal Commission for Technology and Innovation (CTI). The Zurich University of the Arts (ZHdK), Zurich Tourism and Interaction Designer of Dreipol GmbH are also involved in the implementation; Representatives of publishers complement the cross-sectoral cooperation. The theoretical foundations of the practice project are various research projects that are carried out parallel to the institute.

From next fall, the bux app is the first city to open up the Swiss literature metropolis Zurich. Thematic walks lead to the invisible stories of the Limmat City. They lead the way to the origins of Dadaism, show Thomas Meyer's wonderful city trips, or Anne Cuneo's declaration of love to her election home.