A man draws a rectangle that turns out somewhat crooked. Or is it his creativity that leads him to alter the template? This simple act marked the beginning of Johann Hauser's career, which would make him one of the greatest art brut artists of all time. Arnulf Rainer called him "one of the best draftsmen," while Peter Pongratz regarded Hauser as the teacher who showed him what art truly was. Johann Hauser, who came to Gugging in 1949 and remained there until his death, was discovered by Leo Navratil and introduced to artistic expression through copying the drawings of other patients. In 1965, his works were published for the first time, and from 1979/1980 onwards, they were regularly exhibited. This book provides insights into the life and work of the artist.