Edvard Munch once said, “I painted only memories, adding nothing, no details that I did not see. Hence the simplicity of the paintings, their emptiness.” That stark, caught-in-time quality is a facet of Munch’s unique expressionism. Dashes of anger, brushstrokes of melancholy—the effect can be overwhelming. Even digitally, Munch’s power is unmistakable. To celebrate him, the Munch Museum has made available high-quality images of his most famous works. —E.C.