Despite the fact that his work is well known around the world, Swiss-born painter, violinist, essayist, poet, educator, and diarist Paul Klee remains difficult to classify as an artist. While his paintings have been labeled everything from cubist to surrealist, his small-scaled, highly intricate drawings and canvases exhibit a personal, highly fanciful world that remains unique. As Janice McCullagh noted in the International Dictionary of Arts and Artists, Klee's style could not be categorized within a defined "ism." "In spite of his prolific artistic production and his writings, something about this artist remains forever remote," McCullagh explained. "For Klee the artistic journey was focused on nature and nature's ways, but like a monk's his was essentially an inward examination." While his works were exhibited in museums and private collections around the world even during his lifetime, Klee was also a consummate violinist, and had a number of published...