Of twentieth-century artists concerned with questions of the interactivity of the arts, perhaps few have arrived at more compelling insights into the possible innovations and creative pleasures to be uncovered when working at the limen of disciplines than the artist Paul Klee and the writer Italo Calvino. Both are canonical paradigms, their works considered masterpieces of twentieth-century Western literature and art; both are the subjects of considerable critical literature. Their works share key features that include: a refusal of closure and preference for open-ended interpretation, a highly specialized visual and verbal vocabulary, a preference for topical description that eschews psychological depth.