With the help of the app, hidden content in the satirical fantasy novels "Inferno for Beginners" and "Inferno, Chaos & Plots" by C. C. Holister is made visible. Changing illustrations as well as additional stories in audio, text and comic form can be discovered.

The marked pages from one or both novels are required to use the app. Runic symbols on the edge or illustrations mark the pages on which there is something to discover. With the camera of the mobile device, either the page or the illustration is focused and the hidden content appears on the display.