Véra and Vladimir Nabokov were married for fifty-two years—a record, apparently, among literary couples— and their intimacy was nearly hermetic. When they were apart, he pined for her grievously. She was his first reader, his agent, his typist, his archivist, his translator, his dresser, his money manager, his mouthpiece, his muse, his teaching assistant, his driver, his bodyguard (she carried a pistol in her handbag), the mother of his child, and, after he died, the implacable guardian of his legacy. Vladimir dedicated nearly all his books to her, and Véra famously saved “Lolita” from incineration in a trash can when he wanted to destroy it. Before they moved from a professor’s lodgings in Ithaca, New York, to a luxury hotel in Switzerland, she kept his house—“terribly,” by her own description—…