Novelist, literary critic, editor, and translator, Ludwig Lewisohn achieved success and recognition as a man of letters from the 1920s to the 1940s. But despite his fame, his numerous publications, his position as associate editor of the Nation, his friendships with Theodore Dreiser, Sinclair Lewis, and Thomas Mann, despite all his accomplishments, Lewisohn considered himself the Jewish outsider, "the eternal outcast." Remembered primarily by specialists for such critical works as The Modern Drama (1915), The Spirit of Modern German Literature (1916), and The Poets of Modern France (1918), Lewisohn would have appreciated the recent interest in his fiction, which condemns anti-Semitism and assimilation. Although the subjects had been explored by other authors, few had been as obsessed, or, in the case of his best fiction, as eloquent, as Lewisohn. According to Allen Guttmann, "His most significant book, The Island Within (1928) has a claim on every serious reader's attention." In contrast with...