Strange, deformed, and piercingly beautiful, the child acrobat Mignon sprang onto the public stage in 1795. No child at all, but a figment of Goethe's fiction, Mignon appeared and reappeared in countless forms and guises over the next century. The meaning of this compelling creature is at the center of Carolyn Steedman's book, a brilliant account of how nineteenth-century notions of childhood, like those expressed in the figure of Mignon, gave...