Otto's books contain original narratives that tend to critically address contemporary issues. He tries to avoid being self-referential but rather engages with the social and political world around.
The narratives should be as accessible as possible. Using image rather than text allows for the element of visual beauty take effect. But the visual dimension has a different logic to that of text, and not everybody is used to 'reading' graphic language. Especially as Otto tells complex and non-literal stories without relying on aids like picture frames, speech bubbles, or text guidance.