Possible Clues:

• Nabokov novel
• 1957 Nabokov novel
• Nabokov novel after 'Lolita'
• Nabokov's title professor
• Professor of Nabokov
• Titular professor in a Nabokov novel
• Nabokov title professor
• Nabokov novel about a Russian literature teacher
• Vladimir Nabokov novel
• Title professor in a Nabokov novel