What is hidden behind the question mark? The book accompanies the same-named exhibition with the puzzling title “ICHDUERSIEESWIRIHRSIE” by Kathrin Sonntag at the Kunstmuseum Solothurn. It contains three texts by Robin Byland, Kathrin Sonntag and Dorothea Zwirner. The catalogue is divided into three parts with sections featuring texts, pictures and the exhibition. This comprehensive catalogue brings to light the deeply reflective creative output of the artist, her use of a wide variety of media, but also the circumspect references to the exhibition site.