I first learned about Käthe Kollwitz (1867-1945) in college as I was given her name for an art history assignment. Kollwitz was a German expressionist who drew, sculpted and was also a printmaker. There are many of her pieces that haunt me and give me chills. Is there anyone who captured the sorrow and suffering of post-war more powerfully than she did? I can't really pick one piece I favour above all others (Woman with Dead Child (1903) is devastating) but since this is the first one I remember seeing it is the one I've chosen to share. She had a fascinating life - I highly recommend looking her up.
Note: I believe this is the proper title but seeing as I don't have an actual book with me I had to rely on the internet.