“City of Glass” is a work of detective-fiction, however, it explores the city in a way that interests me. The roads of the city are used as a means of communication. Patterns are created using the systems of the streets, which form letters. It is interesting to consider how something like this would be untraceable unless looked for, and even then, the viewer would have to be present. It only makes sense from above, but dissolves instantly. No trace is left behind except the knowledge that it has been done. Undetectable event.