Within the Literary Studies Arno Schmidt is one of the most popular German writers.
The quotes on the glass doors are from Zettel's Traum (for instance: "Those books are made for working." in Zettel's Traum, page 630).
Just have a closer look at the the glass doors' quotes of the carrels/ cabins ...
A good overview on Arno Schmidt's life and work can be found on the following webpages:
To get an impression of Arno Schmidt's work "Zettel's Traum", please have a closer look on the blog "Zettel's Traum lesen" (GERMAN):