During his employment with Darré and Gross, Willrich also authored two books on art, "Säuberung des Kunsttempels" (The Cleaning of the Temple of Art) and "Des Edlen Ewiges Reich" (Of the Noble, Eternal Reich). Both of these books strongly condemned the art of the Weimar Republic as "degenerate" and encouraged the expression of "racial consciousness" in art. In 1937, Willrich was one of the most prominent organizers of the infamous Munich Exhibition of Degenerate Art