G.H. Lewes is probably best known nowadays for being the married man with whom George Eliot lived for years, but he was a fascinating figure in his own right. Rosemary Ashton's biography is, oddly, the only full-length biography of Lewes, though of course he's much discussed in books about Eliot. Lewes was a man of many talents: journalist, novelist, playwright, actor, and scientist. Though he wasn't successful in all of these fields (his novels were regarded as notably bad - I'd love to read one), he was admired for the breadth of his knowledge and interests. His personal life was scandalous, from his open marriage to Agnes Jervis to his long liaison with Eliot, whom he could not marry because by registering Agnes's four children by her lover Thornton Hunt as his own, he had condoned her adultery and thus couldn't divorce her. Ashton's account of his life is scholarly and well-researched, uncovering previously unknown facts about Lewes's life (e.g., that he was illegitimate), and her prose is engaging and readable.