Though it’s now two decades since Andrea Dworkin died, her widower John Stoltenberg still finds it difficult to talk about her. “I sometimes break down,” he warns me, his mellow voice bumpy for just a moment. In a way, of course, she’s all around. He has stayed on in the Washington DC condominium where she died (he lives there with his husband of 15 years, Joe Hamilton); her books and music – she loved country – are a constant reminder of the life they shared. But her absence is deeply felt nonetheless. “It was a huge loss. Sometimes, I turn...