In 1940, Edmund Wilson was the undisputed big dog of American letters. Vladimir Nabokov was a near-penniless Russian exile seeking asylum in the States. Wilson became a mentor to Nabokov, introducing him to every editor of note, assigning to him book reviews for the New Republic, engineering a Guggenheim. Their intimate friendship blossomed over a shared interest in all things Russian, ruffled a bit by political disagreements. But then came Lolita, and suddenly Nabokov wa...