2007 – RAINY – Robert Alone In New York
A personal diary and travel blog about the city that never sleeps.
72 stories and recommendations about New York City. 124 pages.
Language: German

2010 – Der Kuss
Being flirtageous has consequences.
Especially when she wants those 10 seconds before the first kiss. 24 pages.
Language: German

2019 – Schatzi, dauert es noch lange?
55 stories about our daily mis(communication) and how to improve it.
Illustrated by Stefan Sittig. 176 pages.
Language: German

… and some short stories.