In 1835, the German principalities and cities banned the works of German-Jewish poet Heinrich Heine. The censors banned not only the works Heine had already published, but also prohibited, in advance, any work the writer might produce in the future. When Heine sneaked across the border from his Paris exile in 1843, the result was the poem-cycle Deutschland: Ein Wintermarchen (Germany: A Winter's Tale). The Hamburg publisher Julius Campe published this book, and kept all of Heine's work available "under the counter," so that the banned poet was read even more widely than ever. Heine's satires...