Here are 30 exquisite postcards from Wilhelm Staehle’s Silhouette Masterpiece Theater (silhouettemasterpiecetheater.com). Each panel in the popular weekly web comic features a painstakingly detailed etching carved from a beautiful painting; the results are gorgeous and very funny. <i>Stars and Swipes</i> offers a hilarious vision of classic Americana, with farcical frontiersmen, prattling presidents, and other all-American oddities.